Dell Precision Workstation 370 User's & Service Manual page 154

If you are adding a drive that has an audio cable, connect the audio cable to the audio connector on the system board.
1 audio cable (some drives do not have this cable)
2 CD/DVD drive cable
3 power cable
8. If you are installing a new CD/DVD drive rather than replacing a drive, remove the front- panel inserts.
From inside the drive bay, gently press on each side of the insert until it pops out.
9. Check all cable connections, and fold cables out of the way to provide airflow for the fan and cooling vents.
10. Close the computer
NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.
11. Connect your computer and devices to electrical outlets, and turn them on.
See the documentation that came with the drive for instructions on installing any software required for drive operation.
12. Update your configuration information by setting the appropriate Drive option (0 or 1) under Drives: Secondary to
Auto. See "Primary Drive n and Secondary Drive n" for more information.
cover.