Dell D810 - Latitude D820, D830 Series 15.4" WXGA LCD Screen Service Manual page 46

2. Turn the computer over, and loosen the captive screws on the options cover.
1 captive screws (2)
2 options cover
3. If a Mini PCI card is not already installed, go to step 4. If you are replacing a Mini PCI card, remove the existing card:
a. Disconnect the Mini PCI card from any attached cables.
1 antenna cables (2)
2 metal securing tabs
3 Mini PCI card connector
4 Mini PCI card
b. Release the Mini PCI card by spreading the metal securing tabs until the card pops up slightly.
c. Lift the Mini PCI card out of its connector.