Add another ground pin, since the one in the PSU area is fine for testing PSU voltage, but could get shorted against the +9v. Add continuity check diagrams.
Revert "Add another ground pin, since the one in the PSU area is fine for testing PSU voltage, but could get shorted against the +9v. Add continuity check diagrams."

This reverts commit e45e07cb6468e0b70fc929eb6774b6a3d1372fa9.
Add another ground pin, since the one in the PSU area is fine for testing PSU voltage, but could get shorted against the +9v. Add continuity check diagrams.