Here's some info from
Chris Bryant's business web page. It shows the Blower Motor out in the open (readily visible with the plastic shroud off) and the Condenser with Condenser Fan out there too. The Evaporator, Room Air Blower and Drain Pan are all inside a sheet metal housing. This is pretty much the pic Chris had in the Blog post I linked above.

. Left side of pic is front of coach and the RED Return Air arrows are the opening down into the coach where he warns about flooding with wash water, using towels, etc. I was able to use a deflector sheet (expired license plate) and divert spray from a garden hose nozzle away from that opening. It fills the Drain Pan quickly, though, so it's Spray Some, Wait Some. A pressure garden sprayer works pretty well and doesn't fill the drain pan so fast.
I really hope you'll get into this and clean those coils! And the Room Air Blower too if you can get at it. You should find one fin of the squirrel cage blower that lets you reach its Hex Head Allen Screw with a long enough wrench. I'm pretty sure the wrench is NOT metric, and either 1/8" or 3-1/16" size. I was glad to get ours off the motor and clean it on the ground, but you CAN work it on the roof, limited by the reach of the motor wiring. Bring a mat or plywood scrap as a work surface. Other than whatever it takes to remove the shroud, most of the rest of the work takes a 5-1/16" nut driver.