DC Connector pin confusion
That mechanical drawing is terrible.  The little picture of the housing on the left is not oriented at all like the layout for the PCB on the right.  Using the lines at the bottom of each layout diagram, which is supposed to be the edge of the PCB (where the hole in the connector will face), I have labeled the pins on the left drawing with the one on the right.



I found this drawing on the Digi-Key site, for this part:



So it appears C is the center pin terminal, A is the shunt, and B is the sleeve.