Main and Aux are Fleetwood terminology for the Chassis and House battery systems. Yes, those are the battery disconnects for each.
I'm a bit surprised that his jacks and slide are wired through the Aux battery disconnect, though. More often they are wired direct.
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC