Dell POWEREDGE 4300 Service Manual page 77

9. Connect the three Y-cables to the corresponding three pairs of connectors
on the PSPB.
10. Reinstall the PSPB tray in the chassis.
Secure the tray with the screw you removed in step 4.
PSPB tray
captive screw
PSPB
Removing and Replacing Parts 4-19