Lawrosa, you're reinventing a wheel. You already have 30A outlet on your TT.
All you have to do is to plug that long yellow cable into it. Disable the converter and make sure fridge is not in Auto. The other end is plugged into inverter through 15M-30F dogbone adapter. Like Soundguy and others suggested.
Yes but the invertrer will be inside the pass through storage. I dont want to just have the cord running through a open compartment door. I want to be able to shut the door and do a professional install.
Plus when camping in cold climates have you ever left the door open in the pass through? Your back will thank you for closing it. The bed is right over the pass through.
Ask me how I know!!!:)