HPE ProLiant DL345 Gen11 Service And Maintenance Manual page 198

Boot device on top of the power supply cage
4. Remove the SSD from the boot device carrier:
a. Remove the SSD mounting screw (callout 1).
b. Tilt the SSD with the M.2 slot at a 45° angle (callout 2).
c. Carefully remove the SSD from the M.2 slot (callout 3).
HPE ProLiant DL345 Gen11 Server Service and Maintenance Guide 198