I use it with our Morbidelli, which has a backwards Y axis from standard.
I set the Y offset to -49, and make the stock 49" high. This puts zero in the back with negative Y values in the front. I invert the Y values to positive in the post.
While double checking this, I realized that I can get the same thing by selecting back left for the origin and disabling the offset.
Lots of different ways to do the same thing.