I dont know about you but I would interpret "Interior and Guages" to be confined to seats, carpet, upholstery, dash, instruments and things INSIDE the cabin.
Truly, any external electrical questions like lights, will lead into the cabin but it just seems like a more organized form to keep, questions regarding electrical in an purely electrical forum. In the present form you will have some electrical found in the "Interior and Guages" among numerous non re-related seats and carpet items. Under hood electrical, perhaps found in the "engine and go-fast goodies" or "Rest of the Tech"?
Obviously, the current format is working and people are getting great answers in all of them (I know I am). I think a catch-all topic such as I suggest, keeps the other forums more on topic. Unless you would make a case for a designated electrical section being too general?