Hey AKFish,
Pick out a tractor that it fits (4x20)
Then when you "outfit" the machine your optional attachments become available.
Still will be very basic information--usually sales brochures have a better abundance;
Someone here "found a way" into the JD sales stuff awhile back I think; I remember dowloading info on the 300-300CX and MX5-MX7... was same as brochures & owners manuals...
Good Luck!