Your question is confusing. The TOP setting on the MMM is for the height of the deck itself. The driveshaft has a universal joint on each end and slides to lengthen or shorten as you raise and lower the mower. The PTO doesn't move.
Same on the rear end. The PTO doesn't move, the 3pt arms are free to travel full distance up and down. There is no where to make the 3pt stop at a set height. What you can do though is add some chains off the 2 dog-ear loops just inside the tail lights down to the 3pt arms. This will give you a bottom limit for your hog.