Dell OptiPlex 960 Service Manual page 9

1 PCIe x16 card
3 securing slot (not all cards)
5 PCIe x16 card connector
6. Place the card in the connector and press down firmly. Using the following illustration as a guide, ensure that the card is fully seated in the slot.
1 card fully seated 2
3 bracket within slot 4
NOTE: If you are installing a PCIe x16 card, ensure that the securing tab on the connector's release lever fits into the slot on the front end of the
card.
7. Gently rotate the release tab downward to move the card-retention latch into place to secure the cards.
1 release tab
3 card
5 card connector
2 release lever
4 securing tab
card not fully seated
bracket caught outside of slot
2 card-retention latch
4 card-edge connector