IBM RS/6000 44P 270 Service Manual page 246

4. To remove the side covers, do the following:
a. Remove the screws that hold the side covers to the rear frame.
Right Side
Cover Screws (6)
228
Service Guide
Note: The left and right side covers are interchangable, but should not be
switched because the left side cover contains a reference diagram.
Left Side
Cover Screws (6)