I'm working on the headliner in a 2006 Hunter 38. There are some reading light fixtures in the aft cabin and v-berth that I can't figure out how to take down to remove the headliner material. Anyone know how these are uninstalled? They are attached to a light piece of plywood behind the liner, but I can not feel fasteners or bolts on the back side of the plywood. No setscrews or other fasteners are visible on the exposed part of they fixture. I've tried twisting and pulling the light base off the mounting piece with no luck. I'm stumped.