Andrew

Use a dogbone and axle layout that our car friends use. Cut the dogbone in half, add a sleeve (ala torque tube), and 90 degree post to connect to the aileron servo. Allow the dogbone to extend thru the fuselage side. The receiving end of the torque tube in the wing would be similar to the attached axle image. As the wing slides on, just be sure the dogbone crosspiece lines up with the slots in the axle -- you can build your own or use the commercial version.

I might be inclined to use the dogbone and mate it with a slotted carbon fiber tube in the wing.

the "other" Andrew