IBM ThinkPad Dock User Manual page 24

2. Loosen the screw (1); then remove the slot cover (2).
3. Install the PCI card and connect it firmly (1); then reinstall the screw (2).
Note: If you install the PCI card with Wake on LAN, you can connect the
Wake on LAN cable to the LAN Wake connector of the ThinkPad
Dock and the connector of the card. For details, refer to the user's
guide for the card.
4. Reinstall the bottom cover (1) and tighten the screw (2).
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ThinkPad Dock, ThinkPad Dock II: User's Guide