HP ProLiant DL320e User Manual page 42

Remove the optical drive blank.
4.
Retain the blank for future use.
Remove the access panel (on page 19).
5.
If you are installing the optical drive in an LFF drive model, do the following:
6.
Thread the optical drive cable through the optical drive bay.
a.
Connect the cable to the optical drive.
b.
Install the optical drive into the bay, and then secure it with the screw:
7.
Hardware options installation 42