Question on wiring- 1500w rear hub motor kit | Leafmotor

I have installed my hub motor kit on my bike and think IT IS GREAT!!!! I have a question about a wire from the “cruise control-regenerative brake” controller on the handle bar. The connection to the control unit had 4 wires one of which......the blue wire...was cut. I assumed that it needed to be fixed the two blue wires together. I bought two hub motor kits and we have just finished installing the kit on my friends bike and this blue wire is also not connected.....so I am wondering if it is supposed to be disconnected......should I solder this blue wire of cut the blue wire on my bike ..... Again....I think your hub motor kits are great! I have referred my friends to your site and I hope you receive some orders from them. How to use three button switch? 1.We cut off that blue or yellow wire.It's for reverse/backward.This function is very dangerous for e-bike. If for e-tricycle,hope this reverse function,just re-connect this yellow wire. (We cut off yellow wire.. so no reverse/backwards function for e-bike. If install motor on tricycle, also need this reverse function,please re-connect this yellow wire. Reverse works)   This yellow or black button be left / middle,motor works forward. Be right side,motor works backwards / reverse... (Cut off blue wire,No reverse function) How to set max speed? If you feel motor is too fast,please set it to be low speed. * Press “sw/middle button” from LCD more than 2 seconds,then LCD will display. * Press “up & down button” together more than 2 seconds until 72 is flashing ( 72 is kmh, if you hope works 20mph / 32kmh, press “down” to be 32) * Press “sw/middle” button one time to save,then 20 is flashing.. (20 is wheel size. Don’t set) * Press “sw/middle” button one time to save,then kmh or mph is flashing.. * Press “sw/middle” button one time to save,then press “sw/middle” button more than 2 seconds until be back.   Turn throttle,motor will work max speed as your setting.   --------------- There is a “ 5 or 4 or 3 or 2 or 1 or 0” on the Left side of LCD. * Be “0” – throttle & pedal assist NOT work. * Be “1” – throttle works (If install pedal assist, pedal about 3 circles,then can drive motor to work) * Be “2” – throttle works (If install pedal assist, pedal about 2.5 circles,then can drive motor to work) * Be “3” – throttle works (If install pedal assist, pedal about 2 circles,then can drive motor to work) * Be “4” – throttle works (If install pedal assist, pedal about 1.5 circles,then can drive motor to work) * Be “5” – throttle works (If install pedal assist, pedal about 1 circles,then can drive motor to work)   If NOT install that pedal assist,ONLY use throttle to drive motor. But Should be 1 or 2 or 3 or 4 or 5.(Be 0,turn off throttle)   -------------------------------- How to use three button switch? 1.We cut off that yellow wire.It's for reverse/backward.This function is very dangerous for e-bike. If for e-tricycle,hope this reverse function,just re-connect this yellow wire. (We cut off yellow wire.. so no reverse/backwards function for e-bike. If install motor on tricycle, also need this reverse function,please re-connect this yellow wire. Reverse works)   This yellow button be left / middle,motor works forward. Be right side,motor works backward / reverse... (Cut off blue wire,No reverse function) 2.Green button is used to control cruise, while motor is running,also over some speed,example: over 1/3 max speed,at this time,press green button one time,then loose throttle,LCD display “C”,motor will works the same speed. Re-press this green button one time or press brake lever or turn throttle to max,motor will stop 3.Red button be up,regen on. Be down,regen off. This regen is not strong.Only while braking with a little regen.   1.Be careful: Heavy Red Wire from controller should be connected to → Red Wire + (48V or 52V battery positive) Heavy Black Wire should be connected to → Black wire - (48V or 52V battery negative)   Power on battery. Press “sw” middle button more than 2 seconds until LCD be ON. Turn throttle,motor will work. If Not work,please check below: 1. if LCD display “-O-“, the system is braking,cut off motor power.. please make brake levers’ metal ring be back or disconnect brake lever’s plug, then “-O-“ off, turn throttle,motor works. 2. if no “-O-“, still not work,please check three pair of heavy phase yellow,blue,green wires if connected well.