Allied Telesis AT-SBx81CFC960 - Manual (Page 191)

SwitchBlade x8112 Chassis Switch and AT-SBx81CFC960 Card Installation Guide
Section II: Installing the Chassis 191
Figure 132. Closing the Plastic Cover over the Terminal Connectors
9. With a #2 Phillips-head screwdriver, tighten the handle locking screw
to secure the power supply to the chassis. See Figure 133 on page
192.