In the past, I have placed the RF unit under the passengers seat, and
mounted the control head somewhere in the center console. Since the
rig pulls about 12 amps, that cuts down the drop in a long run to the
trunk. Of course, I can use heavier cable if I go that route. In my
old car, I was able to find a cable run which worked well with minimal
Of course another trick is to tie into the DC power to the power seat.
Plenty of capacity, unswitched, and test shows it to be clean. Not
sure about the new car though.