⑪ Unscrew and remove the four screws on the corners of the RBC control box.
Remove the rear plastic cover and separate the battery connector.
⑫ Unscrew and remove the two screws holding the circuit board to the front cover.
⑬ Separate and turn over the circuit board.
Insert the two sockets to prepare for the installation of the bluetooth board.
There are one 3-pin socket and one 4-pin socket included in the kit.
The 3-pin socket is inserted as shown below (be cautious about its position and direction).
