HPE ProLiant DL325 Gen10 Plus v2 User Manual page 140

11. Install the primary riser cage.
12. Install the secondary riser cage:
a. Align the arrows on the riser cage with the arrows on the power supply cage (callout 1).
b. Carefully press the riser down on its system board connector (callout 2).
Make sure that the riser board is firmly seated.
c. Simultaneously push and rotate the half-turn spring latch to 180° (callout 3).
d. Close the spring latch (callout 4).
13. Remove the low-profile retainer bracket for the secondary riser.
Installing the secondary riser option for full-height expansion cards 140