Lenovo ThinkCentre M720s 10ST User Manual And Hardware Maintenance Manual page 42

Figure 57. Opening the drive bay
Figure 58. Removing the Wi-Fi card shield (type 1 and type 2)
Figure 59. Disconnecting the Wi-Fi antennas and removing the Wi-Fi card (type 1 and type 2)
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ThinkCentre M720s User Guide and Hardware Maintenance Manual