[blykins]

Makes sense....

First shifter cam is 4th (forward) & 3rd.

Second is 2nd (forward) and 1st.

Third is reverse.

That's the way it is on a Toploader.

Or wait.....is the middle one on a Toploader reverse? I can't remember....been awhile since I've been in one.

The front one is for sure 3rd/4th.

You can take a little wrench and move the shifter lugs each way. The one towards the rear of the transmission that clicks when you go each way would be 1st/2nd. The reverse gear actually slides back and forth on a shaft with no synchronizers, so it should be easy to feel it.