[Richard]

Our rigs are close in serial number, so we may have the same setup. The 110 line to the air comp originates at the inverter breaker box as you stated. The purpose being to provide air pressure while boondocking. That line goes to the Square D well pump switch used to turn the compressor on and off. I would assume you still have the well pump switch in the generator blower bay? And as you stated the other grey contactor box was triggered by the HWH control system to turn the pump when auto leveling was active.

My wiring was in the bundle of wires secured at the blower. A line from the well pump switch went back through the opening in the back of the gen blower bay to power the air comp in the gen bay.

Long way of saying……look at both the well pump switch and the HWH bypass contactor for the missing line. If not there, look carefully at the bundle of wires at the blower.