HP Apollo 4200 Gen9 User Manual page 80

Remove the air scoop from the HBA.
9.
If you intend to install the H240 HBA in any of the system board low-profile PCIe expansion slots 1, 2,
10.
5, or 6, do the following:
Remove the full-height bracket from the HBA, and attach the low-profile bracket.
a.
For more information, see the documentation that ships with the option.
Remove the onboard PCI expansion slot cover.
b.
Hardware options installation 80