Dell Precision T3400 (Late 2007) - Manual (Page 212)

212
Adding and Replacing Parts
3 Replace the computer cover (see "Replacing the Computer Cover" on
page 262).
Drive Panel
NOTE:
For both tower computers and desktop computers, your drive panel may or
may not have a slot for the IEEE 1394 connector.
1 fan slots (3) 2 fan release tab
3 fan cable 4 fan connector on system board
5 power supply
5
4
3
2 1