Starlink Mini Cable 6.5FT, 20AWG Replacement Starlink Minis DC Power Cable, Starlinks Mini Car Adapter - 12V to 24V DC Step Up Converter with 60W Car Cigarette Lighter Adapter

I'd wire that directly to the camper 12v battery, terminate it in a cigarette lighter socket and use a standard Mini car cable. Or if you want to come off a dash power outlet, this: https://www.amazon.com/STARGEAR-Starlink-Replacement-Starlinks-Adapter/dp/B0FK4F4XLY