HPE ProLiant DL345 Gen11 Service And Maintenance Manual page 103

Remove the optical drive
15. Disconnect the following cables from the system board:
USB 2.0/DisplayPort Y-cable
USB 3.2 Gen 1 port cable
16. Disconnect all cables from the 2 SFF stacked drive backplane .
17. Remove the universal media bay:
a. Remove the universal media bay screws (callout 1).
b. Remove the universal media bay from the server (callout 2).
HPE ProLiant DL345 Gen11 Server Service and Maintenance Guide 103