Dell Precision Workstation 450 User Manual page 110

If you are installing a drive that has its own controller card, install the controller card in
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an expansion slot.
See the documentation that accompanied the drive and controller card to verify that
the configuration is correct for your computer.
Connect the power and CD/DVD drive cables to the drive.
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If you are adding a drive that has an audio cable, connect the audio cable to the audio
connector on the system board.
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