I plumb them every time. After talking with both my Deere dealer as well as the guys at torrent. Torrent said the more flow I ran to the head the better it would run. My deere mechanic said that there is some restriction to quick couplers so I Opted to run it direct as you can see in the photo. One thing I would recommend would be some kind of covering on the hoses. They live in a very harsh environment.
pic one is of 3 way valve that I switch to run thumb or mulcher