house power cutoff switch on 21' Jamboree Searcher

Many thanks for the quick reply. There is a switch panel near the entry door, but I don't think this is it.

The stairs have an electric motor which doesn't work (which the seller disclosed). The rear of these switches and the wiring is visible from a storage compartment. Looking at the rear of this switch, the wires to seem to go to the electric stairs. Also, the wire looks to be 18-gauge or something. On the PW the wires leading to the cutoff switch were massive, they looked like battery cable wires.