I believe that is the same tube I removed to plumb in the line to and from my backhoe.
You may want to check the parts diagram at a Kubota dealer for the backhoe installation kit. Then do what I did which was buy the fittings for each end. Then plumb from there. That way you won't have to use compression fittings in an area that is difficult to get to.
If you are interested, let me know. I might have the diagram somewhere.