Dell Dimension 2200 - Manual (Page 18)

7. 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.
Make sure that the card is fully seated and that its bracket is within the card slot.
8. Secure the bracket on the end of the card with the screw you removed in step 6 .
9. Connect any cables required for the card as described in the card documentation.
10. Rotate the power supply back into place.
11. Replace the computer cover .
12. Plug your computer and devices into their electrical outlets, and turn them on.
NOTICE: To connect a network cable, first plug the cable in to the network wall jack and then plug it in to the computer.