I purchased a 95 Chriscraft 282 Crown last summer. I paid to have the boat prepped for winter last year and that included preparation of the fresh water and waste systems. As far as the water systems go do I have to do anything with them before I put the boat back in the water such as opening or closing seacocks. If so where would I find them, what do they look like and should they be opened or closed before the boat goes back in the water? There were no manuals with the boat when I purchased it.