I recently had to perform a lighting up grade to one of my M105A3 trailers in order to get thru inspection.
The state inspector insisited that the trailer had to meet current lighting standards. Since the trailer is wider than 80 inches i was also required to install clearance lights on the fenders.
I purchased some Optronics LED lights due to the low amperage requirments of the lights.
If some manages to run into the trailer with as lit up as it is now, they would have to be blind.
I also used the same connector shown in the pictures, but I also used the light kit wiring for the new lights, then wrapped everything in silicone splicing tape for water proofing.