I remote-mounted a Pro-2006 years ago by using 25 pair telephone cable. I stripped the outer jacket off and put in two shielded 3 conductor cables and then used a LONG piece of heat-shrink. Worked like a champ and looked factory after I was done. It was in a 91 Toyota Camry (no room for anything).
Years later after removing the scanner from that car, I put it back to the original set-up. I still have the homemade back-plate for the head and the base with the cable.
Showing Back of face-plate.
Showing base of scanner plate.
Lot's of soldering, but it was fun and worth it to me.