It may have float on one (or both) valves. You just push it past the point where it moves the cylinder. You will feel it move into a detent position if it has float.
I will add that the three common types of rear remote valves are standard double acting valves, self cancelling detent valves and float detent valves. If the OP has an SCD valve on the tractor it will lock out in both directions with a detent and return to center when the pressure in the valve reaches some maximum. If the there's a detent (lock out) in one direction only i.e. pushing the lever away from you it's most likely an FD valve. If there's no detent at either end of lever travel it's most likely a standard DA valve.
I have a bit of a hodge podge of valves in my tractors, in part due to what's possible, and what came standard with the tractor, and what I selected based on my needs. At least one FD valve per tractor is essential, and more useful than an SCD valve. I would say that if the choice is between a DA or FD I'd pick the FD every time since it can work just like a DA but offers the option of float as well.
MX6000
1st position - standard double acting valve
2nd position - double acting valve with float detent (FD)
3rd position - standard double acting valve
M6060
1st position - double acting valve with self cancelling detent (SCD)
2nd position - double acting valve with float detent (FD)
3rd position - double acting valve with float detent (FD)