I think you’re misunderstanding the technique… as far as I understand it, you can’t FIM a plant and actually use the removed portion as a clone. It’s too small, unless you’re using tissue culture, which it might be large enough for. That’s a very advanced technique though. You can FIM it, but if you want to take a clone you’ll probably have to cut a small branch off. This link might help you with the finer details.
The first post shows it on real plants, where there’s plenty of foliage to get in the way; the second post shows a more theoretical view with only the relevant nodes and cutting points highlighted.