Welcome to Beoworld, John. Sorry nobody has chimed in to help, but the RX and its decendent the RX2 don't get much attention here. I do not have an RX, but do have two RX2s. If memory serves, the clips and cover are the same on both decks.
Since nobody else has chimed in, I'll take some photos of an RX2 when I get home and post them tonight. Hopefully they will help.
It's a pain lining those clips up, and you may need a second person to hold the first in place when you screw them in.
Current primary listening: SMMC20EN -> BG4002 -> BM4000 -> Beovox M70