spk 64,
THe best and cleanest hookup is to go the loader valve and find the port marked "PB" - power beyond - and find that hose. If should go from the loader valve to the top cover on your tractor. On the BX with one pump it may go back to tank only.
Take it to a hydraulic shop that makes hoses and have them cut it, crimp on new fittings where you can install a male and female quick couplers. They should be where they are accessible when the hose is back on the tractor.
For the splitter, have them build you two hoses - to and from - your open center splitter valve. They should have a matching set of male and female couplers for the PB hose you had modified.
When you need to split wood, you are installing the splitter in series with the loader valve and top cover. When you are just doing tractor work, it is back to normal but can be easily installed on the splitter.
Good luck!