Dell Precision T7400 User's Guide - Page 227

General Drive Installation Guidelines When you install a drive, you connect two cables-a DC power cable from the power supply and a data cable-to the back of the drive. The other end of the data cable will connect to either an expansion card or to the system board. Most connectors are keyed for correct insertion. General Drive Installation Guidelines NOTICE: If metal shields are present in your computer configuration, they must be installed at all times while your computer is in use or your computer may not function properly. When you install a drive, you connect two cables-a DC power cable from the power supply and a data cable-to the back of the drive. The other end of the data cable will connect to either an expansion card or to the system board. Most connectors are keyed for correct insertion; that is, a notch or a missing pin on one connector matches a tab or a filled-in hole on the other connector. Power Cable Connectors 2 1 1 power cable 2 power input connector When connecting a SAS or SATA cable, hold the cable by the connector at each end and press firmly into the connector. When disconnecting a SAS or SATA cable, hold the cable by the connector at each end and pull until the connector detaches. Adding and Replacing Parts 227