HP HPE ProLiant ML30 Gen9 User Manual page 36

Remove the blank from the upper bay.
a.
Install a second power input module into the upper bay.
b.
Connect the power supply cables.
14.
24-pin power cable to the system board
a.
4-pin power cable to the system board
b.
10-pin to 8-pin power cable to the drive cage backplane or non-hot-plug drive cable
c.
RPS cable to the system board
d.
Hardware options installation 36