Dell Dimension 3000 Owner's Manual page 58

3 Align the cutout on the bottom of the card with the crossbar in the system board connector. Gently
rock the card into the connector until it is fully seated.
Ensure that the card is fully seated and that its bracket is within the card slot.
not fully seated card
fully seated card
4 Secure the card bracket with the screw you removed in step 2.
5 Connect any cables that should be attached to the card.
See the documentation for the card for information about the card's cable connections.
58
Removing and Installing Parts
card
card cutout
card connector
on system board
crossbar
bracket
within slot
bracket caught
outside of slot