My suggestion...
Mount the lightbar permanently. First...Jetsonics are heavy to take on and off. You run the risk of damaging some part of the car or lightbar if you drop it. Try getting some poor quality yellowed domes that aren't cracked...prime and paint them satin black...and letter those with Not In Service if desired. That should cover you legally. They are easy to change out.
The cable goes down the passenger side A pillar. The wire clips can be bought at Home Deot..I have extras if you need them. They were originally riveted I believe. I removed my lightbar on the NE SSP due to NH new lightbar law. I now run Federal Signal deck strobes.
Pic Link:
http://public.fotki.com/david0855/19...p/img0791.html