Reinstall the power supply shroud (Instructions found in Chapter 10.8 on page 10-21 of the Service Manual).

Make sure the red and black wires from TB3 rest inside the shroud slots.

Make sure the shroud does nor pinch any cables.

All cable assemblies and wires must be routed between the shroud and the top enclosure wall.

The black ground wire reattaches to the shroud with the longer screw (near connector TB2).