Hey Kenny,
I'll try to remember to take a picture of mine installed asap. There is no linkage. It's just a hydraulic valve bolted to the frame such that the actuator lever can poke through the fender (hole must be drilled at time of installation). Then, the hydraulic hoses are simply run back and forth to the hydraulic coupler bank, zip-tied in various locations.
I think the hydraulic valve itself is either junk or maybe I just got a defective one.
BTW, I have changed my anti-diverter valve stance since adding my pallet forks to my repertoire. I use the forks all the time and, since it is summer, the deck is underneath for the most part. However, when I mow, I do remove the loader so the valve blow by is not a factor. It would be comical to try mowing with pallet forks on the front of the loader. My trees would all be pin cushions!