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.