Well, here's my solution to mounting the umbilical or pigtail. First, I wanted a system to allow removal of the umbilical to prevent damage from the intense Phoenix heat and to deter theft. I had a couple excellent choices, Brad's wedge idea or a straight mount similar to what you see on 70s Airstreams.
I already had a large hole on the curbside front where the old 4-wire plug was mounted (this plug provided 12v
power from the tow vehicle directly to the trailer fuse panel for lighting). Using this old hole makes a lot of sense and gives me better access than where the original umbilical was hard wired to the trailer (the fresh water tank will be moved to under the streetside bed, freeing up space in the front for all of my electronics such as my 12v
fuse panel and my inverter/chargers).
The pic shows my new Pollak 6-wire plug temporarily installed using the original 4-wire access hole. The extra screw holes have been temporarily closed with rivets and a screw (pop rivet gun broke again
), buck rivets will be installed later.
My umbilical has a 7-wire connector on the vehicle side and 6-wire connector on the trailer side (reverse light wire not used of course).
The old hole where the old umbilical entered the coach will be used as an access point for the brake wire and for my battery wiring (my two batteries are mounted on the A-frame).