Compaq EN Series Hardware Reference Manual page 29

4. Connect the drive power 1 and signal 2 cables and, if it is a
CD-ROM or DVD-ROM drive and if analog audio is preferred to
digital audio, connect the audio cable 3 . The other end of the
audio cable 3 should be connected to the embedded audio
connector on the system board.
Connecting the Drive Cables
5. Remove the appropriate bezel blank from the subpanel inside the
front bezel. Refer to the section "Removing Bezel Blanks" for
more information.
6. Replace the computer access panel.
7. Reconfigure the computer, if necessary. Refer to Chapter 1,
"Installation Guidelines," for more information.
Hardware Reference Guide 2-21