Allied Telesis AT-SBx81CFC960 - Manual (Page 193)

SwitchBlade x8106 Chassis Switch and AT-SBx81CFC960 Card Installation Guide
Section II: Installing the Chassis 193
Figure 136. 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 137 on page
194.