HP hpe proliant dl20 gen9 User Manual page 51

Remove the optical drive blank.
6.
Install the optical drive and secure it with the screw provided in the optical drive kit.
7.
Connect and route the cables:
8.
Connect the cable assembly from the optical drive option kit to the rear of the optical drive.
a.
Connect the power cable to the optical drive extension power cable.
b.
Connect the extension cable and the SATA cable to the system board.
c.
Hardware options installation 51