HPE ProLiant ML350 Gen11 User Manual page 56

Install the primary/secondary riser cage Install the primary/secondary riser cage
Procedure Procedure
1. Install the primary/secondary riser cage:
a. Carefully press the riser down on its system board connector (callout 1).
Make sure that:
The riser cage is aligned with the rear chassis.
The riser board is firmly seated on the system board.
b. Simultaneously push and rotate the half-turn spring latch to 180° (callout 2).
c. Close the spring latch (callout 3).
HPE ProLiant ML350 Gen11 Server User Guide 56