Congratulations and welcome to the site.
Go here and download Ed's excellent crowd sourced Axis/Vegas owner's manual:
https://www.thorforums.com/forums/f1...nual-4961.html
You'll solve mysteries you didn't know existed.
(BTW: Battery under steps is the house battery. Chassis battery is under the "hood" on the passenger side--its under the "desk" on the dash.
GFI is the bathroom outlet.
A/C breakers are the panel under the fridge.)