Welcome to the Forum
Here is a thread that came up this week on the very subject.
www.peachparts.com/shopforum/showthread.php?t=260389
I have a couple pictures in post #9.
First picture it the top side, and the second pic is from the bottom.
1 - On the left side of the alternator you will see a 17mm nut. loosen it.
2 - Behind it will be a 17mm bolt, loosen it.
3 - under the alternator is a 17mm bolt, loosen it.
4 - then turn the adjuster nut on the right side.
once tightened, then tighten the other three nuts/bolts.
Hope this helps.
Charlie
for some reason I can`t post those 2 pictures here in this thread.
when I try, in the attachments it says I already posted in the other thread.

stupid computer.