Depending on how much ca you used, you can have from a small to a very large void inside the wing. It's best to fill this void back up if at all possible. A good material to do this with is expanding insualtion foam that you can get in a spray can at the hardware store.

Test a small piece of foam for compatability, and if it's ok, squirt in a very small amount of the foam and let it expand and set up. Trim off any excess and install your hinge.