switches settings in mach3

[dazp1976]

1st. I thought you normally wire the 2 limit switches in series per axis?
2nd. NC or NO difference is represented by either Active low or Active high.
For 2 wire units I'd wire it as + power from the supply and negative to the pin.

Clueless about 3 wire.
Work out which type of switch you have, google search diagrams in images, the information is easily found, research.

That's about as far as my knowledge goes.