Step 7: Solder wires to Wiimote circuit board
Please wear safety glasses when soldering. It is important to solder to the correct side of the button contact or the button will not function properly.
Once the wires are soldered to the buttons on the board, take the Receiver circuit board built earlier and connect and solder the wires to the Receiver board as indicated in the circuit diagram. Also, be sure to write down and note which button corresponds to which connection on the Receiver circuit board.