I have a B7200d 4x4 tractor with a front end loader. I would like to add cylinders to the rear 3 point lift to be able to adjust the angle and tilt my scraper box. Where is the best place to connect the hydraulics to my control valve? Are there rear hydraulic ports for this? Do i have to connect a hose from the outlet port of the FEL valve to the inlet side of my valve in the back?