HP ProLiant DL360 Gen9 User Manual page 61

Install the Express Bay bridge card in slot 1 of the primary PCI riser cage.
10.
Install the primary PCI riser cage
11.
Connect the data cables from the Express Bay drive cage to port 3 on the Express Bay bridge card.
12.
Connect the power cable to the left power connector on the backplane.
13.
("Install the PCI riser cage" on page 24).
Hardware options installation 61