HP ProLiant DL180 Maintenance And Service Manual page 56

To remove the slot cover:
Remove the screw(s) that secure(s) the slot cover(s) to the chassis.
1.
Remove the slot cover(s) on the PCI cage.
2.
CAUTION: Do not discard the slot cover. If the expansion board is removed in the future, the slot
cover must be reinstalled to maintain proper cooling.
Removing the slot cover (1)
Figure 41
Removing the slot cover (2)
Figure 42
To install the PCI card:
Slide the expansion board into the slot, aligning the board with its matching connector.
1.
Firmly press the board to seat it properly on the slot.
Removal and Replacement Procedures 56