Re: Poptop Wiring
For my lights I ran the wires on the inside drivers corner of the penthouse and then over the canvas wall. You have to loosen 4-5 of the screws that attach the canvas to the penthouse roof in order to fish the cables through. Split wire loom covers the wires. This is how SMB routed my solar panel wiring.
From there I drilled a hole through the penthouse roof (outside of the canvas) and used a 1/2" NPT waterproof cable gland to route the wires to the top of the penthouse. Sealed the gland with butyl. Warning: The threads on the cable gland I bought were too short so I couldn't attach the bottom nut. In order to mitigate the risk of the gland leaking or coming loose I drilled the hole just large enough to fit the gland. This created a tight fit on the threads and with the butyl tape there's no way it will leak or fall off. If you can find a gland with longer threads it would be even better.
2006 E350 6.0PSD 5R110, SMB 4X4, RB-50, ARB lockers front/rear, Aluminess galore, AMP steps.