JD 5300 sump return port for Hydraulic motor-pump

[jd5300Del]

I am looking to run a hydraulic motor/pump for spraying. I was looking to have my motor's return line run to the sump of the tractor. However when looking at the SCV (tractor only has one rear SCV, no dual or mid), the SCV does not match any of the diagrams in the technical manual. I was looking for some help in finding the correct port. I am assuming the hydraulic lines on the bottom 2 ports are under pressure. Any help is appreciated. please see the attached photo for the SCV.