JD 401-BD Hydraulic question

JD 401-BD serial no. 308556T. Need to put a remote hydraulic control on for a sickle mower. The tractor has a loader with a two spool valve, but we don't want to take the loader control off the loader. I'm assuming the tractor hydraulics are closed center, so I'm guessing we need a special spool valve? The connections are under the right side kick plate, one line is teed into a line that goes to the steering, and other looks like it just dumps into the filter cover.

JD 401-BD Hydraulic question