HPE ProLiant DL325 Gen11 User Manual page 88

5. Install the negative input wire (black):
a. Insert the negative input wire into the -48V slot on the DC power supply (callout 1).
b. Tighten the screw to 0.98 N-m (8.68 lbf-in) torque (callout 2).
6. Install the protective cover on the DC power supply.
Make sure that the protective cover is locked.
HPE ProLiant DL325 Gen11 Server User Guide 88