I put hoses and quick D connections on my 3510 to run a Jinma Hoe. I also put a relief valve in the circuit for security. As I recall it cost me under $100. I don't have a valve in the circuit.
Under the right fender, above the axle there is a figure 8 dog bone fitting on the rearend housing, I think this is called power beyond. One is pressure the other is return. I bought metric fittings to JIC to fit these openings. I bought short hoses with 90* JIC on one end and Pipe on the other. I put the relief valve between the hoses. Looked like an "H" and short hoses to the quick disconnects.