Carefully remove your main board from the controller. Its not necessary to disconnect the two large ribbon that goes to the array of sensors. If you do be very careful.

Locate the 6 soldering pads at the bottom of the controller near the USB port. Solder a wire to the first pad top left.

Locate the 8 solder pads near the bottom left of the main board. Solder a wire to the top right pad.