I rent my car for movies and such, and I'm looking for a simple solution to hooking up my roof light, which resembles a FS Model 11. The set up should be temporary so the light can be removed when not in use. (I put magnets on the base - the wire on the roof will be camouflaged.) I'm imagining the wires running down the A-pillar, meeting up with a switch at the dash, then connecting to the battery. Not being very knowledgeable about lighting, I need help in-between the light and the battery. It says 12V 9 amp. Thanks!