Seat the motherboard assembly, with the complete C and Z button housing cage, and Wii nunchuck cable back into the bottom half of the Wii nunchuck.

Seat the Wii nunchuck cable into the bottom half of the Wii remote.

Take care when putting the wires for the Wii nunchuck cable back in the Wii remote's bottom half of the remote casing, because they can easily fall out if not seated correctly.