Dell Precision T5400 (Late 2007) - Manual (Page 216)

216 Adding and Replacing Parts
NOTICE: SAS drives and SATA drives cannot be mixed in the rotatable hard-drive
carrier. The drives in the hard-drive carrier must both be either SATA or SAS hard
drives.
9 Slide the hard drive into the hard-drive bay until it clicks securely into
place.
10 Connect a power cable to the hard drive.
11 If you are installing a SATA hard drive, connect the data cable to the hard
drive.
1 drive 2 hard-drive bracket
1
2