I just built a bar with 1565 bottle caps- epoxy covered and want to use a 4.4 cu. ft. Frigidaire as a keg cooler. Where do I cut the hole for the line w/o risking hitting a coil? It has no freezer unit and I'd like to be able to hide the cut hole, in case I need to use the 3 year extended warranty. What about the plastic cap near the top on the back? I did a search on this website and nothing comes up for a model FFPA4422UM.