Final parts arrived so I could finish up the Power Distribution Board and second 2310 Interface Board

2310 INTERFACE BOARD WAS WAITING FOR ONE SCREW TERMINAL PART

When that arrived, the second board was completed and is ready to install in another 1130 system. This board has a relay that routes the Unlock lamp signal depending on whether the Virtual 2315 Cartridge Facility (V2315CF) is set to real or virtual mode. When in real mode, the 13SD disk drive in the IBM 1130 controls the Unlock signal, connected directly through to the 1130 console Unlock lamp. In virtual mode, however, the logic in the V2315CF determines when Unlock should light or be extinguished. 

OLD POWER DISTRIBUTION BOARD PCB MODIFIED AND COMPLETED

The Power Distribution Board lacked a 10 screw terminal connector, but also had the defect that shorted the battery power due to a KiCAD quirk. Finally, I didn't like the trace width for the power traces. These two issues are corrected in the new version of the PCB that is currently being fabricated by JLCPCB.com

I cut the grounding copper traces on the power signal that was incorrectly grounded, restoring the intended operation. I also used discrete wire on the bottom to bolster the current carrying capacity of the power traces. This gave me a usable board but I will swap the parts over to the new PCB once it arrives.