how to add a return to case line

Hi Everyone! I'm new here and looking for some help. I recently got my first skid steer and its a 2007 case 440ct. I bought it to do some brush clearing and a few other piddly things, in any case i purchased a new top cat mulcher and it is set up for 3 line where as my machine is set up for 2 line. So I am trying to find out if i can add a return to case line relatively easy