HP ProLiant ML30 Gen10 Plus Maintenance And Service Manual page 116

5. Remove the processor socket cover.
6. Install the processor:
a. Hold the processor by the edges and align the:
Socket notches with the processor notches
Pin 1 indicator on the processor and the socket
b. Lower the processor straight down, without tilting or sliding the processor in the socket.
Make sure that the processor is properly seated in the socket.
HPE ProLiant ML30 Gen10 Plus Server Maintenance and Service Guide 116