HPE ProLiant ML110 Gen11 User Manual page 121

10. Connect the riser power cable to the secondary riser board.
11. Install the secondary riser board:
a. Attach the secondary riser board on the riser cage.
b. Install the screws on the riser board.
12. Install the riser board cover.
Make sure that the cover is locked on the riser cage with a click sound.
HPE ProLiant ML110 Gen11 Server User Guide 121