HP ProLiant DL180 Gen9 User Manual page 66

If you intend to use an FBWC module, install the module in the storage controller. Depending on the
6.
controller model, the cable connector on the cache module might be facing up or down when the
module is installed on the controller board.
Connect the cache module cable to the module.
a.
Install the cache module on the storage controller.
b.
Install the storage controller:
7.
Hardware options installation 66