Lenovo ThinkPad T520 User Manual page 177

10. Connect the cables to the new PCI Express Mini Card. Be sure to attach the gray cable to the connector
marked "TR1" on the card, the white cable to the connector marked "RO" or "TR3" (center), and the
black cable to the connector marked "TR2".
11. Reinstall the keyboard. For details, refer to the instructions in "Replacing the keyboard" on page 130.
12. Reinstall the battery. For details, refer to the instructions in "Replacing the battery" on page 119.
13. Turn the computer over again. Connect the ac power adapter and cables to the computer; then turn it on.
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Chapter 6 Replacing devices
159