Lenovo 6457 - ThinkPad T61 - Core 2 Duo 2.5 GHz Hardware Maintenance Manual page 110

Table 33. Removal steps of structure frame (continued)
Remove the system board and the PC Card/ExpressCard slots assembly from
the structure frame together.
14
13
When installing: For the models with the wireless WAN features, you need to
attach the cushion a that is shipped with new structure frame. Peel off the
covering film of the adhesive tape on bottom side of the cushion, and paste it on
the new structure frame as shown in this figure.
a
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ThinkPad T61 and T61p (15.4-inch widescreen) Hardware Maintenance Manual