This all sounds like a lot of work to me.... Are you just wanting to added another outlet with USB outlets?
Using an outlet that was next/ near to your current one (Wire like you would for your house - see you tube - lots of videos) and then use the recepital that has two build in USB outlets.
Or you can add to your existing fuse panel and run romex (if nothing is in a slide) and find where the factory ran your other wires (inside the RV) fish it though to the area you want the outlet and try to pick somethig easy to install (not an outside wall).
Or am i not understanding what your asking?
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2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, TPMS, Surge tank, Tornado flush, Viair Compressor
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