I really can not help--the dealer removed the board--that's all I know. again--IIrc the clicking was like a relay and it came from above the passengers window (which is where the forward end of the awning is)--when I was standing to the rear of the entry door. The tech was using the switch above the door to try and extend it. I would guess the "phone-style" cable has wires from the panel above the door which in our rig has Extend/Retract and Awning Lights on/off switches. I'd look for a way to remove the cover of the box. My guess the board is inside. Click the Salesman Switch to turn off the house batteries first tho
Our rig is at the dealers--been there for a month getting many problems fixed, so I can't go look at it or I'd be more specific. Searching Dometic with awning model might show a manual for the box.