HP ProLiant DL388e Gen8 Server - Manual (Page 39)

Hardware options installation 39
Ensure the cage latch is secured in place before tightening the drive cage screws.
8. Connect the drive power cable to the rear drive cage.
9. Connect the shorter SATA and sideband signal cables to the system board:
a. Remove the primary PCI riser cage (" Remove the PCI riser cages " on page 24 ).
b. Connect the sideband signal cable from the rear drive cage to the system board.