On many of the models of that vintage, the disconnect switch is a chrome-plated bell-shaped pull, usually located in the right corner of the control panel. Pulling the switch out connects the battery. I hope this helps, and welcome to the club!!
2012 Fun Finder X-139 "Boondock Style" (axle-flipped and extra insulation)
2013 Toyota Tacoma Off-Road (semi-beefy tires and components)