How to setup probe on Mesa 7i96

TB3 pin 12 is the common for inputs 0..10 (TB3 pins 1..11)

I can"t find that pin in the PNCCONF Wizard TB3 page.

Its a physical pin that determines input operation.
Inputs will not work unless is is connected properly

OK I guess I will have to take the board down. I have been running this exact set up for a year. What do I put on the #12 pin?

TB3 pin 12 is the input common

If the input devices supply positive voltages to the 7I96 inputs
(PNP type sensors or limit switches with one pin connected to a positive voltage)
the 7I96 input common would be grounded.

If the input devices ground the signal to the 7I96 inputs (NPN type sensors
or limit switches win one pin connected to ground), the input common
would be connected to +5 to +24V

I see that pin on pinout. I really don't don't think I have ever used that pin before but maybe I'm wrong.