Our Regency has three quick disconnect nozzles with manual ball valves in the lower side of the circuit board panels. An air source can be readily attached to any one and then allows servicing or leak repairs. My question is where can one connect to the air compressor to air up tires? I don’t relish using a service air input line and watching the suspension or brakes shift. I have not found any supply connection in the engine bay. Ideas?
Also there is a 25 watt ceramic resistor mounted but not connected to anything- anyone know what that’s about?
Thanks

If you make a double female air hose you can hook up to those taps to get air back out of the system. You could also install a chuck into one of the air tank fittings

Are there fittings that would go into the compressor in the engine compartment?

Generally the air compressor output goes directly to a dryer/oil separator (Haldex?) then forward to the tanks. If you tap air from the tanks the compressor will supply clean dry air there.

I have a closed off air supply in the Engine compartment. It fed the vacuum generator. No longer need the vacuum. Would be easy to put a female air hose connector on it.

Our vacuum generator was in the front generator compartment.