Allied Telesis AT-SBx31CFC960 - Manual (Page 191)

SwitchBlade x3106 Chassis Switch and AT-SBx31CFC960 Card Installation Guide
191
Figure 136. Closing the Plastic Cover over the Terminal Connectors
Caution
Do not over tighten the screws or you may crack or break the plastic
cover.
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
192.