Access Under Power Twin

Can anyone tell me how to access everything under the power twin bed on the passenger side of a 2552?  There are screws along the wall the upper board, but I can see how to remove the part of the bed platform that slides in and out on the tracks.  I'm planning some electrical upgrades and I'll need access to replace a few things.  Thanks.

Its been over a year since I removed the surface panels. The panels were all screwed down. The one thing that I remember is some of the screw heads were sunk into the wood & hard to find. Of course, your 2021 might be different from the 2020. Hope this helps, Chuck