Lenovo ThinkCentre E73 Hardware Maintenance Manual page 172

1. Insert the Wi-Fi card module into the mini PCI Express slot, and then install the two screws to secure
the Wi-Fi card module to the Wi-Fi adapter card.
Figure 114. Installing the Wi-Fi card module
2. Connect the front antenna cable and rear antenna cable to the Wi-Fi card module.
Figure 115. Connecting the Wi-Fi antenna cables
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ThinkCentre E73 Hardware Maintenance Manual