Hi, super late response but I've got a B6000E with a FEL and Backhoe. I built a bracket and fastened a hydraulic pump to the PTO. Hub City sells an adapter that will bring the 10 spline shaft the standard six spline, I then used a quick coupler with 6 spline that slides over the adapter and the other end is a 1/2 keyed slot which the pump fits into. Bolted to my bracket and mounted to the bottom bracket of the three point. I have a tank on my backhoe. Digs super strong, I can go down almost 6 feet and I can lift 1500 pounds easy. I built a frame mount which ties into the loader frame just like the factory hoe did. By the way the factory hoe is a model B619, I copied the plans when building my frame mount. The tractor pump puts out about 1200 PSI, I am running around 3000 on my hoe, tractor pump is about 2.5 GPM, I am running 4.5gpm on hoe. My loader has a remote pump run by belt off the crank. These tractor's pumps are not really designed for anything other than THree point. Although I am aware some of the manuals will have you splice into the top of the hydraulic lift cylinder for pressure, I think the pump is just not up to the task.
Hope this helps others in the future.