The local boat guy let me have his. I borrowed it because the one he ordered for me is back order for several weeks ago and it wasn't coming. I attached a dishwasher hose to his adapter as well as a quick connect adapter and it was done in an instant. I was a bit rushed to do this because I only have one trailer for two skis and the one still in the water will need to be pulled soon as the water level is so low that the bottom of the ski will soon end up touching the bottom of the lake. In winter mys skis are on wood carts with coasters.
I still winterize them because 20 years ago we had this monster freezing rain storm that left us without power for two weeks here...
Simple piece of plastic that fits on one side to a RV antifreeze jug and to the hose on the other side. I'll receive mine at some point...