If you are fletching your arrows from the beginning, they should simply fall into place....That is, unless you are having to turn your nocks for tuning issues....

After you clean off the glue from the one you are replacing, you should still be able to see where it was.....Just take your time and make sure the clamp is lined up in the same place before you glue it by turning the nock.....It takes a little practice, but it can be done.