Aren't there strings in the wing to tie on to the servo extensions? If not, take a wheel collar or something similar and tie a string on it. Hold the wing section with the tip pointing up. Drop the wheel collar through the ribs from the servo cutout. When you get the collar out of the exit hole in the wing center, tie the other end of the string to the servo extension and feed it through the ribs while keeping tension of the string. Make sure you secure the connection between the servo wire and the extensiopn. You can use shrink wrap, tape, or dental floss. Parsons make a very nice plastic item for doing this also. Do a search for "Parsons" on the Tower hobbies site.

Bob