In photot #2 above the hose at the top right (closest to the top at the stern) connects to the oil tank vent on my machine. The main water outlet from the cylinder head is right by the carburators, you can see part of it right in the center of the attached photo under the plate that supports the carbs. Not sure why there is that smaller additional hose on the top of the head on some motors, maybe to give a bit more circulation at the front on the other side - ? There is no battery vent connection on mine. This motor is actually a swap from a '90 SP and while I was careful to label all the hoses it is possible something might be misrouted.