Thanks guys, actually dug into everything yesterday. Once I got into the engine compartment I found the sea cock which I hadn't seen in the past. My boat is winterized on the water and left there for the winter months so being my first time I was a little concerned with the process.
I probably went overboard just a bit, I closed the sea cock and removed the hose, using a funnel I had my buddy pour a gallon through the hose and I pumped it into the toilet. Then pumped out the dump tank and poured another gallon in for the winter.
I actually did the same thing for both the air conditioner and the generator. It worked really well for a little winter security. Drained all the water from the AC and Generator at the sea cock then poured a gallon of AF into the hose while turning on the unit. Had somebody stand and watch outside the boat till everything ran pink and shut it down. Now I feel like I know there is no small amount of water hanging around in the system.