Lenovo 6457 - ThinkPad T61 - Core 2 Duo 2.5 GHz Hardware Maintenance Manual page 81

Table 19. Removal steps of PCI Express Mini Card for 802.11 a/b/g wireless LAN (continued)
3
When installing: Plug the gray cable into the jack labeled MAIN on the card,
and the black cable into the jack labeled AUX. If the computer you are servicing
has three cables, put the white cable in the cable bag in the card slot
After you secured the card, make sure that the antenna cables are routed as
shown in the following figure. .
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ThinkPad T61 and T61p (15.4-inch widescreen)