we're newbies too - here's what we know.
on the "driver's" side, there should be a small door close to the wheels, open that door and there is the drain for the tanks. It's one drain, about 3 inches diameter. Hook the hose up to that and on either side are two handles. Those two handles are the open (pull) and close (push) for black and gray tanks.
For the manuals - search here on this site, i would try flagstaff manuals. These guys have posted almost every manual for every RV ever built...or so it seems.
Same for winterizing. A quick search and you should have your answer.
Best of luck, sorry your intro to RVing is under such circumstances.
--2009 Sunseeker 2860DS (Class C)
- one Hotwife, and two boys under 2(with one on the way!)
2013 - 53 days
2012 - 26 days