Inspect the rack on the left side, the side closest to the door, you will see that the end plate is doubled, that is, two pieces of wood side by side.....
You want to get something thin and flat like a putty knife between the two pieces and gently pry them apart... they are stapled together.
Once you have them apart, you will see the screws that are holding the rack to the shell on the inside piece.
The screws on the far right that hold the rack to the bulkhead are obvious and should present no problem.
If you are careful when straightening the staples out, you can re-install the piece by aligning the staples and original holes and gently tapping the piece back into place.
Care must be taken not to strip the screw holes in the shell. Examine the fit before re-installation to determine if larger screws should be used.
Not a big deal.... Good Luck !
T & K