Dell Dimension YH242 Owner's Manual page 98

4 Push the two release tabs on the card retention door toward each other and pivot the door open.
Because the door is hinged, it will remain in the open position.
1 release tab
5 If your computer includes a card retention mechanism to secure the x16 card, press the release tab
downward gently and then pivot the mechanism upward to access the card slots.
2
1
1 PCI Express x16 card slot
4 PCI Express x1 card
98
Removing and Installing Parts
1
2 card retention mechanism
2 PCI Express x16 card
5 PCI Express x1 card slot
2
3
3
3
3
card retention door
4
5
securing tab