I have a leak at the sink spray attachment. I also have a portable dishwasher and should not even have a spray attachment at the same sink. When I installed the spray attachment, I don't remember there being anything plugging the hole that the attachment connects to. But now that I am taking it off it seems that there must have been because it just lets the water run out under the sink. Do I need to go in search of some plug or is it something else that I am overlooking?