You haven't had any replies to this question because it's a tough one to answer. Not because you're being ignored.

How many kits have you built? I'm going to give you a brief explanation, but if this is your first kit, you might not "get" it.

The simplest way is to build the wing, then cut the ailerons out of the wing. Now, that being said, you need to prepare for this.

Does the wing have a rear spar where the leading edge of the ailerons will be? Most likely it doesn't, which means you'll have to cut each rib in order to install one. It will also require double ribs on each end of the aileron so that once cut out, both the wing and the aileron will have ribs at the ends.

That's the "easy" explanation.

I'm hoping the illustration will help.
Dennis-