Sorry guys no pics, the one goes to the inlet on the front of the manifold, this I know. I have 2 other 3/4 size holes on the top of the manifold that water goes through, one is for the heater hose. Can I circulate the heater if I use the other one with the other hose? They are both on the same passage. My other heater hose went to the 2nd hole on the water pump but the new pump only has one.