Lenovo ThinkStation P520 Hardware Maintenance Manual page 184

5. To remove the Wi-Fi card, do the following:
a. Disconnect the two Wi-Fi antenna cables from the Wi-Fi card.
b. Remove the two screws that secure the Wi-Fi card to the Wi-Fi adapter.
c. Gently pull the Wi-Fi card out of the mini PCIe slot.
Figure 134. Removing the Wi-Fi card
6. To install a new Wi-Fi card, do the following:
a. Insert the Wi-Fi card into the mini PCIe slot on the Wi-Fi adapter.
b. Install the two screws to secure the Wi-Fi card to the Wi-Fi adapter.
c. Connect the two Wi-Fi antenna cables to the Wi-Fi card.
Figure 135. Installing a Wi-Fi card
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P520 Hardware Maintenance Manual