Lenovo 10B0 Maintenance Manual page 184

Figure 125. Installing the WiFi card module
3. Connect the front Wi-Fi antenna cable and rear Wi-Fi antenna cable to the Wi-Fi card module.
Figure 126. Connecting the Wi-Fi antenna cables
4. Locate the two PCI Express x1 slots on the system board. See "Locating parts on the system board"
on page 80.
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ThinkCentre M73 Hardware Maintenance Manual