Dell OptiPlex GX520 - Manual (Page 72)

8. Connect the adapter cable to the serial-port adapter connector (SER2) on the system board.
9. Connect any cables that should be attached to the serial port adapter.
10. Replace the computer cover .
Removing a Serial Port Adapter
1. Follow the procedures in " Before You Begin ."
2. Gently push the release tab on the retention lever.
3. If necessary, disconnect any cables connected to the adapter.
4. Grasp the serial-port adapter bracket by its top corners, and ease it out of its connector.
5. Replace the computer cover .
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NOTICE: Do not route cables over or behind any installed cards. Cables routed over the cards can prevent the computer cover from closing properly or
cause damage to the equipment.
NOTE: See the documentation for the serial port adapter for information about the cable connections.