seabee ed-
First off, welcome to iRV2!
Second, you should add a "signature" to your profile. It contains whatever info you want; most people put info about their coach there, so they don't have to type it into each message. Instructions for adding a signature are
here.
I'm guessing (based on our coach) that the Sanicon power comes through a circuit breaker that is mounted near the house batteries. Go to your house battery compartment follow a positive lead off the battery bank to a black plastic box. Look in the box for a copper bus; one side is connected to the house batteries, the other fitted with circuit breakers.
I seem to remember that the Sanicon power flows through a relay, too, near the switch.