Dell OptiPlex 330 User Manual page 202

1 heat sink assembly
3 captive screw housing (2)
10 Connect any cables disconnected before removing the heat sink assembly.
11 Replace the computer cover (see "Replacing the Computer Cover" on
page 207).
NOTICE:
and then plug it into the computer.
12 Connect your computer and devices to an electrical outlet, and turn
them on.
13 Verify that the computer works correctly by running the Dell Diagnostics
(see "Dell Diagnostics" on page 111).
202
Mini Tower Computer Parts
To connect a network cable, first plug the cable into the network device
3
2 heat-sink assembly bracket
1
2