Lenovo ThinkPad X220 4298 User Manual page 158

9. Align the contact edge of the new PCI Express Mini Card with the corresponding socket.
Note: You can also replace the PCI Express Mini Card for Wireless WAN with an mSATA solid state drive.
10. Pivot the card until you can snap it into place by pressing the upper side of each connector. Secure
the card with the screw.
Note: Depending on the system configuration of your computer, the card may have only one connector.
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