Sorry. It's a Maytag electric model DE482
You're not being stupid. The reason your original answer wasn't what I needed is probably that you couldn't believe somebody would be stupid enough to ask what I'm actually asking.
I think you've got the question now, but I don't need to know about the ribs facing up and so on. I'm just trying to figure out how to make sure the belt goes directly up to a point on the drum so that it will stay on. If I put the belt too far toward the front of the dryer, or too far toward the back, it will surely come off when I turn the machine on. So need to get it right. It seems like there should be a groove there or it. Is there?
I guess this is the main question: is there a groove on the drum itself, the big thing, the actual drum, in which the belt is supposed to go? Or does it not need to go in any sort of groove on the drum (and there is a suitable looking groove there that it COULD go it, but I read that it doesn't need to go in that.
So, is there a particular place, a clearly defined groove, that the belt needs to go into ON THE DRUM?