Dell Vostro 400 (Mid 2007) - Manual (Page 133)

Removing and Installing Parts
133
6 Replace and tighten the four screws to secure the hard drive.
7 Connect the power and data cables to the drive.
8 Connect the data cable to the system board.
9 Check all cables to be certain that they are properly connected and firmly
seated.
10 Replace the computer cover (see "Replacing the Computer Cover" on
page 166).
1 second hard drive
(optional) 2 power cable 3 serial ATA data cable
4 system board
connector 5 screws (4) 6 screw holes in the hard
drive bay (4)
2
4
3
1
5
6