Dell Precision T3400 (Late 2007) - Manual (Page 195)

Adding and Replacing Parts
195
NOTICE:
If you are installing only one hard drive, install it in the primary hard-drive
bay. If you are adding a second hard drive, install it in the secondary hard-drive bay.
6 Slide the hard drive into the primary or secondary hard drive bay until it
clicks securely into place.
7 Connect the power cable to the drive.
8 Install the hard drive.
To install a serial ATA hard drive:
a Connect one end of the serial ATA cable to the hard drive.
b If you are installing a serial ATA hard drive in the primary hard-drive
bay, connect the other end of the serial ATA cable to the SATA0
connector on the system board.
If you are installing a serial ATA hard drive in the secondary hard-drive
bay, connect the other end of the serial ATA cable to the SATA1
connector on the system board.
1 drive 2 hard-drive bracket
1
2