HP Netserver E Server series - Manual (Page 46)

Chapter 5 Installing Additional Boards
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7. Use the T-15 driver or flat blade screwdriver to remove the PCI slot cover
for each slot to be used, and store it for future use. See Figure 5-2.
You may need to tilt the slot cover inward before lifting it out of the
chassis.
Slot Cover
Chassis
Cross-
Section
View
Figure 5-2. Removing the Accessory Slot Cover
NOTE Ensure you save the slot covers for use later to prevent EMI
interference. These slot covers make a better metal-to-metal
contact than previous slot cover designs.