Lexmark T650 Service Manual page 475

4062-XXX
11. Insert the long thumbscrew into the hole in the interface card. Turn it just enough to hold the card in place.
Do not tighten yet.
12. Insert the screws to secure the mounting bracket to the system board.
13. Tighten the thumbscrew, and insert the interface card plug into the blue connector on the system board.
4-153
Repair Information