Unfortunately, i do not have a service manual for my tractor.... though i should get one. The plugged ports under my seat are in the block where the pressure line goes into the rear of the tractor to power up the TPH. I don't think it would be a huge issue if using this port to power rear remotes would only allow me to use one valve (or the TPH) at a time...... as i don't forsee me wrestling two or more levers on the rear at a time. I was hoping someone here had used these, and could tell me if this would be an acceptable way to get hydraulics to the rear.