Quick connect....
It probably doesn't have one then. Most skis have a plug, that will allow you to tap a quick disconnect to them. I think if your model has it, it will be on the upper, right corner of the pump housing.
You can go to your local Auto Parts store and get a radiator flush kit and connect it to the discharge line of the head (starborad line, rear side of head).........between the outlet and where it connects to the outlet of the pump...........:cheers: