What Tommy describes is the usual way it is done on the chinese tractors with the loader connected between pump and diverter. But I notice you have a quick connect in the line comming out of the diverter running back to the 3PH and rear remote control valve. You could connect the loader in using that quick connect union. The purpose of the diverter is to give the steering priority over the other hydraulic uses, so I have always been surprised that most of the chinese tractors I see have the loader plummed in upstream of the diverter.
The loader should work fine plummed in at that quick connect after the diverter, just like the 3PH and rear remotes farther downstream do... You will need a set of matching QC fittings to mate up with those already on the tractor, and 2 high pressure jumper hoses to run from the QC's to the loader input and output ports. The line comming off the diverter will go to loader valve input and the line out of the loader valve will connect down to that QC on the end of the hard line to feed back to the rest of the hydraulic system.