Drill a 3/8" hole in the outer case of the pedal for the stereo jack. Be sure to a pick a location that does not interfere with the movement of the pedals.

Strip the cable and solder the shield, tip, and ring wires. Be sure to match the labels on the pedal circuit board. Use some heat-shrink tubing for each connection.

Attach the stereo jack to the case with the included washer and nut.