Remove the dirty water tank, take the lid off and on the front, in the very middle is a plastic square ( if you were looking straight down on it you would see it is open in the middle ) pull up on it and it will come out. then you take the square end of the attachment hose and slide it into the place you took the other out.
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Remove the dirty water tank, take the lid off and on the front, in the very middle is a plastic square ( if you were looking straight down on it you would see it is open in the middle ) pull up on it and it will come out. then you take the square end of the attachment hose and slide it into the place you took the other out.