The one on your fingertips is a breather hose - leave it alone. The one on your thumb should go in the bottom of the separator. On the back of the mani there should be one nipple blocked off and one coming forward with a line to hook up to the vacuum system. I've posted pics before but for whatever reason they are not showing up tonight...MODERATOR could you fix this?
Also, if you haven't found it
RealOEM.com Online BMW Parts Catalog has diagrams that can help identify parts and where they go.