HPE ProLiant DL380 Gen10 Plus User Manual page 100

2. Remove the clear plastic cover on the side of the power supply.
3. Do the following:
a. Remove the grounding screw from the front of the power supply.
b. Remove the four screws from the -48 V wire and return wire connectors.
Installing the HPE 1600 W Flex Slot -48 VDC hot-plug power supply 100