winterization and flushpro

My boat had a flushpro already on it when I bought it. I've been reading alot about winterizing with it. They all mention an antifreeze adaptor. Can someone post a pic of the adaptor, I have no idea what they are talking about. Not sure that I have that. Thanks

I have flush pro but have never heard of this adapter. I just disconnect the hose from the flush pro and stick it in a bucket of RV anti freeze.

Yea, I tried that, but it wouldn't suck up the antifreeze. I even put duct tape over the intake on the bottom of the hull....