I only have experience with the BA-10, I don't know if the AX's are the same. The fill plug is about halfway down the tranny on the passenger side.The drain plug is in the rear of the tranny. It's a reverse square drive, somwhere between 5/16" and 3/8".
I had to make the tool with a 3/8"extension, ground down a bit on each of 4 sides. Someone may know what the size is and where to buy the tool, but I made mine for the block drain plug.
Be sure to take the fill plug out first (you wan't to be sure you can get it out before you pull the drain plug). Then remove the drain.