Dell Precision 690 - Manual (Page 74)

4. Disconnect the power and data cables from the back of the drive.
5. If you are uninstalling your only IDE CD/DVD drive and will not replace it at this time, disconnect the data cable from the system board and set it aside.
If you are uninstalling a SATA optical drive and not replacing it, disconnect the SATA data cable from the system board.
6. Slide the sliding-plate lever to the right to release the shoulder screw and slide the drive out to remove it from the drive bay.
7. If you are not installing another drive in the CD/DVD drive bay, install a drive panel insert (see Replacing a Drive-Panel Insert ).
8. If you are installing another drive in the CD/DVD drive bay, see the appropriate installation instructions in this section.
9. Reinstall the drive panel (see Replacing the Drive Panel ).
10. Replace the computer cover (see Replacing the Computer Cover ).
1 IDE data cable
2 power cable
3 SATA data cable
4 system-board SATA optical connector (labeled SATA on the system board)
5 system-board IDE connector
1 sliding-plate lever
2 CD/DVD drive