930 Case heater return hose?

[Harold Smith]

Just bought a 930 case with a cab. The heater does get much water circulation. I looked at the hose routing. The hot is good, coming off at the top of the water manifold but it is returned to the block. I want to put it to the bottom/suction side of the water pump. There is a pipe plug on the side of the water pump housing . Would that be a suction or should I just tap into the inlet right above where the lower radiator hose sides on?

 

[casecollectorsc]

On my 1030 I went into the plug in the water pump. Works great! 1170 is plumbed into water pump also.