02 Roadtrek 200P How to access Danby Air Conditioner?

[PJW73NH]

I've got a horrendous rattle and most annoying squeak coming from my Danby AC unit. I have isolated it to the left side where it meets the wood of the left storage compartment. If I drive a couple of PVC or wooden "door and window" shims in between the AC unit and the wood, it cures 85% of the rattle & squeak.

This solution has a few issues. 1. Looks horrible. 2. After 3 miles on a poorly maintained roadway, the shims fall out. 3. Not very "elegant".

Further, there is a "tray" of some sort underneath it. I suspect a condensation/drip tray with an outlet somewhere. This "tray" has a lot of what looks like disintegrated "rock wool" insulation in it. I can get a few pieces out by hand, by the front of the tray. How much more is in there? Where did it come from? How do I replace it?

In addition to the questions above I ask:

1. Anyone else have this issue (squeak/rattle) and what did they do about it.

2. Any suggestions as to what to try?

3. How do I access/remove the AC unit to attempt my OWN modifications/repairs?.

Thanks.