While it was a long time ago, I do not remember my Scamp
19 Deluxe having a switch anywhere near the loft. Perhaps it was a modification from a previous owner if you did not purchase the trailer new. Does it control the outside porch light
? Or a ceiling light
? Is it identical to other switches Scamp
installed in other locations? In any case, it might help in the identification of what it’s purpose is if you could post a picture from far enough away so it’s location is obvious.