I need some help filling out your Custom Fit questions on your website.  
I have a 2005 KAMA 554 tractor, are you familiar with that model?  I don't know if it has a closed or open center on its hydraulic system.  I do know there are two levers that operate the hydraulic ports to the rear.  It has two exterior sets in the rear.
I am attaching a picture of the rear end where you can see the connections, the top and side links too.  Please send me a PM because I want to purchase a complete system from you.  I want to make sure it will fit and work properly.