Dell OptiPlex 360 (Late 2008) - Manual (Page 88)

88 Processor Heat-Sink Assembly
5 Tighten the two captive screws evenly to secure the heat-sink assembly to
the system board.
CAUTION: Ensure that the heat-sink assembly is correctly seated and secured.
6 Reconnect the fan power cable to the system board (see "System Board
Components" on page 13).
7 Follow the procedure in "After Working on Your Computer" on page 17.
1 heat-sink assembly 2 heat-sink assembly bracket
3 captive screw housing (2)
1
2
3
Desktop Computer