1- make sure the derailleur mounting plate is fully back in the right dropout and tight.
2- install wheel all the way back into the mounting plate, and hold it centered between the chain stays with one hand while tightening the right bolt firm, but not necessarily full tight.
3- at this point the wheel should stay close to center on the chainstay if you let go. If it moves way off center that indicates that the dropouts aren't parallel and is something you might to let a pro take care of for you.
4- holding the wheel centered tighten the left nut, then tighten the right full tight.
5= go ride it.
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Chain-L site
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