Dell Precision 690 - Manual (Page 31)

3. Press the tabs on either end of the card retention device and lift to remove it from the computer.
4. Press down the tab on the top of the card retainer at the appropriate card slot and pivot the card retainer back through the chassis wall.
5. If you are installing a new card, remove the filler bracket to create a card-slot opening. Then continue with step 7 .
6. If you are replacing a card that is already installed in the computer, remove the card:
a. If necessary, disconnect any cables connected to the card.
b. If the card is full-length, press the release tab on the end of the alignment guides on the fan bracket.
c. If the connector has a release tab, press the release tab as you grasp the card by its top corners, and ease it out of its connector.
7. Prepare the card for installation.
See the documentation that came with the card for information on configuring the card, making internal connections, or otherwise customizing it for your
computer.
8. If the card is full-length, align it between the plastic card guides on the card fan.
9. Position the card so that it is aligned with the slot and the securing tab (if present) is aligned with the securing slot.
1 card retention device
2 tab
1 release tab
2 card retainer
NOTICE: Ensure that you release the securing tab to unseat the card. If the card is not removed correctly, the system board may be damaged.
CAUTION: Some network adapters automatically start the computer when they are connected to a network. To guard against electrical shock, be
sure to unplug your computer from its electrical outlet before installing any cards.