Allied Telesis AT-SBx81CFC960 - Manual (Page 120)

Chapter 6: Installing the Power Supplies
120 Section II: Installing the Chassis
Figure 57. Removing the Blank Slot Cover from Power Supply Slot C
3. Remove the power supply from the shipping package and verify that
the shipping package contains the items listed in Figure 58 on page
121.
If any item is missing or damaged, contact your Allied Telesis sales
representative for assistance.