C10 to 7i76e using pncconf

I am moving from a C10 parallel to a 7i76e control. The stepper drive being used is a G203v.

Using the pncconf wizard, I am not understanding the 7i76e TB2 connector pinout, to the (I assume) "I/O connector 1" in pncconf.

The TB2 is wired as follows.
Pin:

1. GND -> Chained to the three G203v (XYZ axis) Common
2. STEP0- -> G203v Step (X axis)
3. Unused
4. DIR0- -> G203v DIR (X axis)
5. Unused
6. Unused
7. Unused
8. STEP1- -> G203v Step (Y axis Mill/ Z axis Lathe)
9. Unused
10. DIR01- -> G203v DIR (Y axis Mill/ Z axis Lathe)
11. Unused
12. Unused
13. Unused
14. STEP2- -> G203v Step (Z axis)
15. Unused
16. DIR2- -> G203v DIR (Z axis)
17. Unused

In the pncconf tool, what does the Num column represent?

pncconf uses the component number so in your pic, X stepper in pncconf is number 0.
In the mesa docs you show step0 is pins 2 and 3

Chris