[Alan Anderson]

Cut a PWM cable in half and splice the signal wire from the sensor (either black or white) to the signal wire going to the Digital Sidecar (white).

If you're not comfortable splicing wires, use the terminal strip from the Kit of Parts. Screw the incoming wire to one side, and the outgoing wire to the other side.

Make sure you connect power to the sensor properly. The power wire (brown) goes to the red side of a 20 amp circuit from the Power Distribution board, and the common wire (blue) goes to the associated black side. Again, splice appropriately-sized power wires to the sensor wires (or use the terminal strip), because the large Wago connectors aren't designed for the small gauge wire of the sensor.