[Markt63]

I'm working on restoring a '66 car orginally from California. I have a couple elctrical items I can't find in any manual and don't make sense to me. Hoping some of you veterans can help me out. It starts with what looks like a coil (round tube) with two wires coming out located in the grill just inside the driver's side horn. Two wires go to a square metal box in the driver's side fender apron right behind the grill. Two other wires go from the square metal box through the fire wall under the carpet. Haven't gone to the trouble of removing the carpet yet. Any idea what this coil and square box may be? THANKS!