Lenovo ThinkStation P300 Hardware Maintenance Manual page 142

2. Remove the two screws that secure the Wi-Fi card module to the Wi-Fi adapter card.
Figure 95. Removing the screws that secure the Wi-Fi card module
3. Pull the Wi-Fi card module out of the mini PCI Express slot to remove it from the Wi-Fi adapter card.
Figure 96. Removing the Wi-Fi card module
Installing the Wi-Fi units
To install the Wi-Fi units, do the following:
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ThinkStation P300 Hardware Maintenance Manual