Yes, this can be done. First thing I did was decide where I wanted to do my penetration test. Looking at the design and wiring, I came to the conclusion that this kegerator does not have refrigeration lines throughout the shell like a refrigerator does. I may be WAY wrong on that, but following the lines from the compressor into the shell, they all seem to lead to and from the black refrigeration panel in the back of the unit. So based on that, I decided to boldly go where no man has gone before or some such nonesense.
First, I carefully drilled a pilot hole from the inside:
Closeup view is next. I actually drilled just enough to make it throught the plastic and probed around with a piece of wire. Not hitting anything but foam on either side, up, down or forward, I drilled until I hit the back wall. The lower hole on the left is the drain that doesn't work worth a crap, reason being is it is not flush with the lowest point on that little shelf so the water pools and freezes instead of draining...
From the back it looked like this:
Using my drill with a 1/2 inch bit, I forged ahead and completed my preliminary hole:
I used a dremel tool and an old chain saw sharpening bit to slowly open the hole up on both sides until the hose JUST fit through. I used keg lube on the hose to help get it through. Here is a picture of the bit and the hose installed:
Here is what it looked like on the inside once I finished. Note that I removed the black screw on the top holding the refrigeration panel in place and used a longer screw with a few washers to ensure the same depth to hold up my (oversized for this kegerator) CO2 manifold.
And from the outside, once I put everything back together:
Total time to mod the kegerator was about 10 minutes, going slow as to not break the darn thing. I may be wrong about the refrigeration lines but I think this cheap Chinese kegerator actually may be as simple as I described above.
I would like to do 2 more modifications to this unit. First, I am going to remove the tower and replace it with a two or three faucet tower. Second, I am thinking about removing and replacing the internal plastic walls. If I can get about 1/2" more space, I believe I can fit 3 5 gallon Cornies versus the current two in this kegerator. I have no time in the next month or two to take on these projects, but when I do I will be sure to post on here for anyone else with this unit.