Dell OptiPlex 755 User Manual page 107

1 card retention latch
4. Remove the filler bracket (if applicable).
NOTE: See the documentation that came with the PS/2 serial port adapter for information on configuring the adapter, making internal connections,
or customizing it for your computer.
5. Align the PS/2 serial-port adapter bracket in the retention slot and press down firmly. Ensure that the adapter is fully seated in the slot.
1 card fully seated
3 bracket within slot
Before you close the card retention mechanism, ensure that:
The tops of all adapters and filler brackets are flush with the alignment bar.
l
The notch in the top of the adapter or filler bracket fits around the alignment guide.
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6. Close the card retention latch and gently press until it snaps into place.
NOTICE: Do not route cables over any installed cards. Cables routed over the cards can prevent the computer cover from closing properly or cause
damage to the equipment.
7. Connect the adapter cable to the serial port adapter connector (SERIAL2) on the system board (see
2 alignment guide
2 card not fully seated
4 bracket caught outside of slot
System Board Components for connector locations).