How much hydraulic flow to the three point? The answer will determine if you use a D02 or D03 open center series sub plate and electric over hydraulic 3rd function plumbed in-between the inlet for the third function and the joysticks power beyond port or a simple electric over hydraulic diverter valve on the loader's curl function.
Or simply run hydraulics off of a rear remote valve and run the hoses forward up the loader.