Am I correct is assuming that the cigarette lighter connector on the cable contains circuitry to reduce the voltage from 12 VDC to the ~ 5 VDC USB standard? Or is it just a plug and the conversion takes place elsewhere? I want to hard wire my GPS to a Switched 12 VDC source under the dash. I can wire a cigarette lighter socket under the dash or solder wires to the existing connector. The next problem is the hole that I have to drill in the dash. It would take a 1.75" hole to pass the plug through. Can the wires in the cable be cut, passed through a 3/16 hole and re-soldered? What size wires are in the cable, are they color coded, and are they solder-able? Some audio cables don't solder well. This is an expensive cable and I don't want to ruin it.