Lenovo 10A4 Hardware Maintenance Manual page 224

Figure 202. Installing the screws to secure the Wi-Fi card module
3. Connect the front Wi-Fi antenna cable and rear Wi-Fi antenna cable to the Wi-Fi card module.
Figure 203. Connecting the Wi-Fi antenna cables
4. Install the Wi-Fi adapter card into the PCI Express x1 slot on the system board. Then, rotate the PCI card
retainer to the closed position. See "Locating parts on the system board" on page 81.
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ThinkCentre M83 and M93/p Hardware Maintenance Manual