I used 3 sets of lights and the toggle switch from NAPA.
I pulled the lid seal up from the body enough to get the wires in between the carpet and body, front 2 light wires towards the back and the rear light wires going forward than fished them together under the carpet to the back to bring all together under the rear trailer light service cover.
Soldered all positive to a pigtail and the negative to a pigtail.
Soldered the negative to OE inside light assembly and the positive to the power supply to the OE light harness.
The wires of the LED lights were long enough as they were.
I bought some velcro, self adhesive hook side, 1/2 inch wide by 10 foot and cut it down to 1/4 in wide stuck it on the back of the lights and placed them on the carpet below the seal.
I'll add a picture of the wired switch after work for an idea of how it turned out.