I still can't find the galley tank dump valve
I have a 2003 Montana 3655 fl 5th wheel. There are two dump tank valves inside of a compartment. The front most valve is the black tank. I am assuming the rear valve is the gray. Inside, my lights show black, gray, and galley. The gray shows empty, and we haven't been using the shower, just the bathroom sink a little. The galley shows 1/2. Pulling the back dump valve does dump anything. So I am assuming I have a galley dump valve somewhere, but I can't find it. I think the sensor is correct because we have been washing dishes. I have looked under the slides on both sides and around the wheels, and just can't find it.
Does anyone have or has had a similar model? Please help.