Compaq Evo D310 MT Hardware Reference Manual page 27

Hardware Upgrades
2–16
2. On the rear of the computer an expansion bracket cover secures
the expansion slots. To remove the expansion bracket cover,
remove the screw from the bracket cover 1, then remove the
expansion bracket cover 2.
Removing the Screw and Expansion Bracket Cover
3. Inside the computer, locate the expansion slots on the system
board.
4. If removing an expansion card, hold the card at each end,
and carefully rock it back and forth until the connectors pull
free from the socket. Be sure not to scrape the card against the
other components.
Hardware Reference Guide