Recently picked up my 09 Rincon, love it so far..started crawling aorund it and discovered a brass fitting with nothing connected to it on the bottom of the rear diff. Can't find that on my manual that I downloaded, getting ready to drain the rear end, hope that wasn't supposed to be capped or something. Can't be a breather being it's on the bottom. Somebody fill me in on what that is, or check the one that they have to see if I'm missing something. Just looks like an open tube right now, is that the drain for it? Thanks for your help.