HP Compaq dc5700 SFF Hardware Reference Manual page 28

9. Before installing an expansion card, remove the expansion slot cover or the existing expansion
card.
a. If you are installing an expansion card in a vacant socket, remove the appropriate expansion
slot cover on the back of the chassis. Pull the slot cover straight up then back toward the inside
of the chassis.
Figure 2-13
22 Chapter 2 Hardware Upgrades
Removing an Expansion Slot Cover
NOTE Before removing an installed expansion card, disconnect any cables that may
be attached to the expansion card.
ENWW