ABNjk09

Hi All, This is my first ATV and I'm picking it apart to learn about it. I noticed this tube hanging and can't figure out what it is. Can someone ID it for me and tell me where it plugs on to? It's a 2000 Xpedition 425. (Blue arrow points to the one I'm talking about.) I'm also looking for some real basic parts diagrams so I can learn more about this thing. If someone knows of anything similar to what I've posted for a Jeep feel free to point me in the right direction. Thanks!

First time ATV owner and I'm anxious to start taking it apart and fixing it up. I just got a 2000 Polaris Xpedition 425, did not receive a user or service manual with it. I'm looking for both. Any chance there's one available for download? Thanks! I can't wait to get this thing up and running! (I saw another post on page 16 from someone looking for the same thing, but did not see a response/file.(