I have dismantled a CX5400 and the detailed instructions I was following weren't detailed enough. I am having trouble re-attaching the hoses correctly and I also have a black part that I have no recollection where it came from. It looks like some of the hoses might connect to it. It has 3 arms (2 flat w/ kind of a "L" shape and 1 with a rectangular fitting). How does it attach?