Chinook RV

I connected the exposed wires from my handle bar light to a 12V power supply and the light still works, but I was wondering if a schematic exists for connecting these two wires to my vehicles electrical circuit?

The handle light is on the same circuit as the porch light above it, and the stair light, if you still have the lighted step. There is a switch panel of 3 switches mounted on the bathroom wall between the bathroom door and the rear door. One switch controls the three lights mentioned. A second switch controls the side light (other porch light) under the awning and the third switch controls a light next to the dump valves (for night dumping?!).

The lights are on a DC circuit in the brown box, either the "O/H Lights" circuit or the "Ceiling Lights" circuit, probably the former.