Just purchased a used Westendorf loader to mount on my NH2120. The NH has an existing 2 spool remote control assembly on it (diagram attached). 3 lines run in to the valve assembly and 4 lines run out to the implement. The Westendorf has an 2 lever control mounted to the loader with 2 hydraulic hoses to be connected to the hydraulic system (see pics). Is it safe to assume that one of these hoses is a return to the reservoir and the other to power the hydraulic cylinders? My question - how do I connect these to the tractor's hydraulic system (given that there were 3 lines running into the NH 2 spool valve assembly and only 2 lines running into the Westendorf valve assembly)? Thanks in advance!