Dell Precision T7400 (Late 2007) - Manual (Page 245)

Adding and Replacing Parts 245
11 Ensure that all connectors are properly cabled and firmly seated.
12 Reinstall the drive panel (see "Replacing the Drive Panel" on page 249).
13 Replace the computer cover (see "Replacing the Computer Cover" on
page 145).
NOTICE: To connect a network cable, first plug the cable into the network port or
device and then plug it into the computer.
1 data cable 2 power cable
3 data cable 4 SATA2 connector on system board
1
2
4
3