Dell Precision T3400 (Late 2007) - Manual (Page 229)

Adding and Replacing Parts
229
5 Gently slide the drive into place until you hear a click or feel the drive
securely installed.
6 Attach the power and data cables to the floppy drive or Media Card
Reader.
7 Connect the other end of the data cable to the system board connector
labeled "FLOPPY" (for a floppy drive) or "USB1" (for a Media Card
Reader). To locate system board connectors, see "System Board
Components" on page 148.
1 drive 2 screws (2)
1
2