Hi Babs,
Yes they are on the side at the top, usually when you get seated tickets on the Fnac it shows you where you are seated. When you tried it did it show you the stadium with where you would be seated?
Did you get those tickets?
By the way: if you see the mention "places séparées", be careful that means that the seats are not together (which is not the case on those places above).
If you haven't taken the seats yet, I would recommend that you rather buy tickets "bas" instead of "haut", because haut is quite high and you'll see better by being "bas", and you will also feel more into the concert.
Let me know if I can help you more!