Be a little more specific.. is this a power beyond capable block? It will make a big difference in how you plumb aux hyds if it is or is not. Lotsa ways to do it to make it work, some of them are better than others.
What type of aux hyds are you trying to run? using qd's? or is it something permanently mounted?
The more info you give us.. the more info we can give you.
Obviously, the in/out on that block refers to it's serial nature.. most likely if you trace the lines, you will fint the inlet line came from the pump, and the outlet goes to something like the 3pt hitch.. etc.. there may be other connections if yor tractor has PS and does not have a dedicated PS pump.
soundguy