First welcome aboard!
Now the easiest way to do this is to go to your nearest RV dealer that sell norcold refrigerators and buy there. I ordered from Amazon and UPS beat the living crap out of them! I went through 2 of them before giving up trying to save a couple bucks and went to my RV dealer. They use a trucking service to ship which handling is much much easier than UPS.
Just Google norcold and can figure out the model that you need. Taking one out is a piece of cake . Four screws and they slide out . You will have a 12v wire and a 110v plug to pull out .