Need hydraulic circuit for wood splitter

[230Dforme]

I have a 2000 yr Dresser TD9H with a ripper. I bought a 3pt hitch splitter, removed the 3 pt and
mounted it on a beam and fabricated it so it can
be easily taken on and off the ripper. 
Believe I need an open hydraulic circuit (?), anyone
know how to accomplish this ? Thankyou 

[JoshNZ]

If you've only got one control (no log lifter) you just want a single open centre double acting spool yep. Run the ripper in constant pumping mode, aux fitting to the spool input, and output back to the tank or return hose aux fitting. And obviously each end of the ram goes to each port on the spool