Dell XPS 730 H2C (Late 2008) - Manual (Page 9)

14. Remove the filler bracket or existing card (see Replacing the PCI and PCI Express Cards ) to create a card-slot opening.
15. 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.
16. Position the card so that it is aligned with the slot and the securing tab (if present) is aligned with the slot.
17. Gently pull the securing tab (if present) and place the card in the connector. Press down firmly and ensure that the card is fully seated in the slot.
1 retention screw 2 card retainer
3 alignment guide 4 fan bracket
NOTE: If the card is full length, insert the card guide into the alignment slot on the fan bracket.
1 PCIe x16 card 2 securing tab
3 PCIe x16 card slot
CAUTION: Ensure that you release the securing tab to seat the card. If the card is not installed correctly, you may damage the system board.