Compaq 247320-003 - Deskpro 4000 - 5166 Model 2500/CDS Reference Manual page 140

To remove an expansion board, follow these steps:
1. Remove the expansion board cage.
2. Disconnect any cables attached to the expansion board.
3. Remove the screw at the side of the expansion slot.
4. Hold the board at each end and carefully rock it back and
forth until the connectors pull free from the slot. Be sure
not to scrape the board against other components.
5. Store the board in antistatic packaging.
6. Install an expansion slot cover over the open slot.
To install an optional speaker in the expansion board cage,
complete the following steps:
1. Remove the expansion board cage from the computer
chassis.
2. Slide the speaker under the metal tabs on the expansion
board cage.