The outside spray port that has just a hose hookup on the outside. I also did the blackwater spray thing too. All faucets and shower and toilet. My winter storage facility has a dump station that I plan on using one last time. We are also looking to go out again first week of November one last time before locking it up. It's probably not going to dip into freezing temps before middle of November. 45-50 during the day and a dip into 30s or high 20s shouldn't be enough to freeze it I wouldn't think. Either way I am covered now. Thanks or the help.