Dell Dimension 4700 Series Owner's Manual page 62

CAUTION:
network. To guard against electrical shock, be sure to unplug your computer from its electrical outlet
before installing any cards.
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
62
Removing and Installing Parts
Some network adapters automatically start the computer when they are connected to a
card
card cutout
card connector
on system board
crossbar
bracket
within slot
bracket caught
outside of slot