Power Computing PowerCenter PRO User Manual page 128

Installing Internal Drives
4. If there is a metal plate across the front of the drive bay, remove
the screw holding it on the left side as you face the front of the
computer, swing that side of the metal plate back, and pull the
metal plate out.
If the drive you are installing doesn't use removable media, do not remove
the metal plate or the plastic filler panel.
metal plate
98
PowerCenter Pro User's Guide
For Technical Support, Call 1-800-708-6227