'93 300E Belt Tensioner Replacement

[yowhatup]

I have a nice '93 300E I've driven now for 2 years. It's my wife's car and it runs great (160,000 miles).
My dad and I replaced the belt tensioner, adjustment rod, and shock about a year ago, but I tried to adjust the rod without loosening the center bolt, and I ruined the tensioner, so now I have to do it all over again, because it is squealing terribly, even after I tried to manually tighten it.

A new one is on the way.

My question is this: How do I put the adjustment rod on THE CORRECT WAY? I think we put it on wrong, and that's one reason it messed up.

Also, what is THE CORRECT WAY to install the belt tensioner. I want to do it for the LAST TIME! It's about to drive my wife crazy, and I know it's not good to drive around like that.

Please help!