Not familiar with the 4 door model but the 2 door has a switch to run on propane regardless of whether or not you are plugged in or on genny power. In the top right I see what appears to be a thermometer. If so, you have 12v power so the fridge should power up on propane. Note: There are things that need to be checked if it does not. Please post your progress.
No PM’s. Inflating my trailer tires to max and checking the trailer tongue weight daily.