HP ProLiant ML350 Gen9 User Manual page 51

Install the server base blank covers over the server base feet holes.
10.
Turn the server over, and then remove the access panel (on page 31).
11.
Remove the air baffle (on page 33).
12.
Remove the fan cage (on page 36).
13.
Locate the system maintenance switch on the system board.
14.
Configure position 10 of the system maintenance switch to ON for a rack configuration.
15.
Hardware options installation 51