Just pop the axels back in, when you tap the axels in with a rubber mallet the little clip on the teeth part will snap back in. When they took off the springs the took stuff off that they didn't need to and probably pulled the axels over the get the shocks and springs and the axels popped out. It is no big deal, I just put new axels in my car last year. Just tap them back into place and your all good. If your shop teach could figure that how, he should be teaching auto shop class!!!