How do I losen the serpentine belt on a 97 chevy cavilier?

I am changing the alternator on a 97 Chev Cavilier. Basically which pulley is the tension pulley and what is procedure for releasing it.
How do I losen the serpentine belt on a 97 chevy cavilier?
There should be a pulley bracket with a square hole in it.

The square hole is where you put a ratchet or breakover bar.

Then you can pull or push on the tensioner pulley to take the tension off the belt.

Some tensioners you can just put a wrench on the screw that holds the pulley on the bracket.

If there is a square hole in the bracket...use the square hole.

Note:sometimes the square hole is on the backside of the bracket.
How do I losen the serpentine belt on a 97 chevy cavilier?
I just have to know how the hell do you think you can change an alternator if you cant even find the belt tensioner. How do you know what the alternator is? Good luck
There's always some way to get a wrench on the tensioner. Then you just have to turn it to loosen it while you slip the belt off. It can be fun trying to do it yourself.
Dave is right. this is one of the hardest belt i have done, you must get the belt on the engine pulley first and then go to the other pulleys.