The two that are right next to the grab handle and door? One operates the amber colored porch light outside, the other operates one the ceiling lights inside the trailer, probably near the sink. Turn on the switch, turn on all lights, and then turn the switch off to see which one it operates. Leave the switch on that one light on, so that it's operated by the wall switch.
2007 T-286SR Cherry/Granola, #6236, original owner, current mileage: 9467.8 (as of 5/26/19)
1997 T-2653 Blue Denim, #5471
1979 12 1/2' MC, Beige & Avocado, #4639
Past Sunlines: '97 T-2653 #5089, '94 T-2251, '86 T-1550, '94 T-2363, '98 T-270SR