Start with the wider ribbon cable from the grip panel. Position the cable end properly by hand or with plastic, dull tweezers, then insert it into the connector under the open black lid.

Do NOT use a sharp, metal object to attempt to insert the cable or close the lid; this could risk puncturing the battery and causing a fire!

Once the cable is inside the connector, pull down the black lid to close it. The cable should be securely in place.

Tuck in the excess of the ribbon cable underneath the printed circuit board, slightly rolling it into the pocket underneath.

Do NOT score or sharply bend this cable, as this could damage it and break the grip function of the controller.

Use tweezers to wrap the smaller ribbon cable around the battery, and insert it into its connector closer to the top of the printed circuit board.