If you'll tell us the model, maybe someone will come along that has the same model and let you know.
In the mean time, look for a panel with screws holding it in. They've been found under the sink, oven, fridge, in the pass-thru, near the power panel, in the bedroom, bathroom, entertainment center, and other places.
If it's working now, you can operate a function on and off as you go around listening for the click of the relays. That'll get you close.
Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin!