Dell OptiPlex 755 - Manual (Page 47)

6. Before you close the card retention mechanism, ensure that:
l The tops of all cards and filler brackets are flush with the alignment bar.
l The notch in the top of the card or filler bracket fits around the alignment guide.
7. Secure the card(s) by closing the card retention latch and snapping it into place.
8. Connect the adapter cable to the PS/2 serial port adapter connector (SERIAL2) on the system board (see System Board Components ).
9. Replace the computer cover (see Replacing the Computer Cover ).
Removing a PS/2 Serial Port Adapter
1. Follow the procedures in Before You Begin .
2. Remove the computer cover (see Removing the Computer Cover ).
NOTICE: Do not route card cables over the cards. Cables routed over the cards can prevent the computer cover from closing properly or cause damage
to the equipment.
1 release tab 2 adapter retention latch 3 PS/2 serial-port
adapter bracket
4 serial port adapter
connector
5 serial port adapter system board
connector (SERIAL2)
NOTE: See the documentation for the PS/2 serial port adapter for information about the cable connections.