I can tell you that whichever position you choose, you will find that the top link needs to be adjusted for best mowing contouring, vs max lifting. Max lift height would be what I would call transporting. The TopLink needs to push into the mower for best terrain following to make use of the floating top mount(Toplink hole over lower pin). This extended position decreases the max implement lift height.
The lower three point arms to lift arms, have a static height adjustment on the lift arms. Some have multiple lower mount holes in the 3 point arms. The mx6000 does not. If it did that would also change the lift geometry for force.
The top link tractor side, will change the range lift with lowest being the most range of motion.
For this reason I carry a crescent wrench to adjust in the field and before transport. For what your asking you may want to consider either not extending the top link to negate the floating cutter feature, and get your max lift height. It will cut poorly if you have much terrain. The other option is a hydraulic top link which would solve your issue, and give you best of both worlds.