Flush Pro Questions

I just got a centurion falcon v and it already had a flush pro installed. My question is what part do I nead to be able to winterize my boat using the flush pro system. I was reading on I boats, It said that it comes with an adapter for winterizing. And I do not have one. Just wondering where to get one thank you.

Is there some reason that you need to flush it?

no it just came on there. But I would like the part to be able to winterize it.

I thought that the part is attached to the flush kit itself, I think is is a little thing to stick in the garden hose attachement of the flush kit to pry open the spring so that you can pour the antifreeze in there. It is not needed when running the hose as the pressure opens the valve.

Never used it, but pretty sure it is the black thing which is attached by the blue strap, to the right of the white garden hose fitting in the pic:

Tape off the hull inlet. Get a short piece of garden hose and screw it into the top of the above. Place the cut end into a bucket of antifreeze. Start the engine.