Well you can do it the way you want
I preconfigure them.
I configure one, and then i turn on one more and configure it and put it a name(normally i put the place where it will be placed i dont liek putting AP1 AP2 AP3...) disconnect that and put it on the box again and put back on the box, and on the box i put the name of the place where it should be mounted. And so on.
When they are connecting it the guys mount them just look the correct AP as they are all named and moutn them.
At lesat thats how i have been working.... and i prefer doing it this one because you can find a faulty AP that came damaged from the Fabric.... and ill get notice of that BEFORE they mount them...
If they mount them first and there is a faulty AP you will have to dismount it.
Hope it helps
Cheers
Carlos