Well you could add a valve like a loader control valve using those quick connects by the brake pedal you noted. You will need an "OPEN CENTER" control vlave with "POWER BEYOND" and one set of matching chinese quick connects(mixing diferent makes of QC's is not a good idea). You will also need the hoses to reach your chosen valve location, the mount for the valve will have to be built and a return port to the resevoir will have to be added.
The QC line comming from the pump will go to the valve inlet.
The Power Beyond outlet of the valve will go to the other QC and on downstream to feed the rest of the hydraulics(steering and 3PH).
The return port out of the valve will go the the return port you must add to the resevoir.
The Return Port out of the valve is where the fluid from the safety goes when you run a cylinder to it's end stops or try and move too much weight with it. It is also where the fluid comming back from the other side of a moving cylinder goes. It needs an unobstructed low pressure path back to the reservoir. There are a few ways to add this. The pipe running down the left side of the transmission comming from the steering plumbing is the steering return line. You could possibly tap or "T" into this line at the steering fitting if you can find matching fittings.
I added a return port on mine by machining and adding an elbow and QC to the filler plug at the back of the reservoir. But since the plug is also the air vent you would need to make another air vent. I had already done this to stop fluid comming out the air vent when working with the tactor front up a steep slope. Here is a link to 3rrl's Spin On Hydraulic Strainer thread.
http://www.tractorbynet.com/forums/...-spin-hydraulic-strainer-overflow-kama-2.html
The last post on there is by me and has a pic of my return port. The relocated air vent can be seen just forward of the red elbow/QC. It has a inline fuel filter screwed into the port I drilled and tapped. I added dessicant to the filter to cut down on moisture drawn into and condensed in the reservoir by moist air.
