Well, it depends - what year is your car? There was a significant change made to the engines over the lifespan of the Aveo, and the procedure is different.
This is the procedure for the later model:
https://drive.google.com/file/d/0B74...JOY05nUDg/view
For the earlier model: (note, the pics aren't working it seems, but it does a decent job of describing the position things should be in)
http://www.aveoforum.com/forum/f94/t...rite-up-10284/
I'm assuming you are putting a new timing kit in this engine (if not, I would highly recommend it) - the last half-dozen or so timing kits I've purchased for various cars have all come with vehicle specific documentation that shows all the marks and relevant positioning; make sure they didn't tuck the paperwork in the bottom of the box.... If you don't have the kit, go buy one before moving forward; even if it was replaced 2000 miles ago, it's considered poor practice to reuse a timing belt after it's been tensioned and then removed.