I have nothing like that on my 1999 American Cruiser, but I also don't have any fiberglass on the inside like it appears you do. My porch light switch and bathroom light switch are located in strange places. Perhaps that's what the other two switches are for!
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1999 American Cruiser Class B
2006 Palomino Puma 27FQ Bunkhouse
2007 Gulfstream Innsbruck 36FRS Park Trailer