Dell Precision 490 - Manual (Page 77)

8. Gently slide the reader into the FlexBay until you hear a click or feel the reader securely installed.
9. Attach the interface cable to the Media Card Reader.
10. Connect the other end of the interface cable to the system board connector labeled "USB." To locate system board connectors, see System Board
Components .
11. Check all cable connections, and fold cables out of the way to allow for airflow between the fan and cooling vents.
12. Reinstall the drive panel (see Replacing the Drive Panel ).
1 Media Card Reader
2 screws
1 sliding-plate lever
2 Media Card Reader
1 interface cable
2 Media Card Reader system-board connector (USB)
3 Media Card Reader