I am no help as to the original setup inside your popup. BUT why not do what a lot of us and instead of modifying an intact unit consider yours a clean slate.
Take a look at similar sized unit layouts and design your insides to your personal taste, abilities and of course, bankroll.
Good luck and have fun.
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2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6
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