Dell Precision 690 - Manual (Page 32)

10. Place the card in the connector and press down firmly. Ensure that the card is fully seated in the slot
If there is a release tab on the card slot, pull the release tab.
11. Before you rotate the card retainer back into place, ensure that:
l The tops of all cards and filler brackets are flush with the alignment bar.
l The notch in the top of each card or filler bracket fits around the alignment guide.
12. Rotate the card retainer until it snaps into place.
1 bracket within slot
2 bracket caught outside of slot
3 card fully seated
4 card not fully seated
NOTE: For extra security, remove the alignment guide (an upside-down screw) and screw it in right side up to secure a card.
1 card retainer
2 alignment bar
3
alignment guide
NOTE: For extra security, remove the alignment guide (an upside-down screw) and screw it in right side up to secure a card.
4 filler bracket
NOTICE: Do not route card cables behind the cards. Cables routed behind the cards could cause damage to the equipment.