Unless you are utilizing some of the factory refrigerator space as ferm space why don't you just gut it and mount the compressor to the chamber on the side with the cooling coil interior to the box. It'd save some space. They're not hard to tear apart I have one 90% torn apart to do the exact same thing. I'll be using it as a ferm chamber as well as a cask cooler with with a place to bolt the beer engine on a shelf.
Going through life is hard.
Going through life stupid is harder.