Yep, I just did the same thing in my 29h.
My junction box was in the overhead above the door, behind a false side.
My unit has a 1000w inverter from the factory, so while I was there I extended the power to another receptical in the back of the frig (the frig is next to the door).
Now I can move the refrigerator plug to the new receptical and run the frig on 120 instead of propane while traveling.
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