RE: FlyFly BAe Hawk 90mm EDF
Before installing the wing, the aileron servo leads are connected to the Y-harness and lay flat in the wing top channel so they don't interfere. The wing is self-aligning along the chord on both the leading and trailing edges. It is held secure by two machine screws. Overall, this was a well thought out design technique using laser-cut ply pieces to strengthen key areas of the mating foam sections.
Note that the black foam piece covering the unused openings is cut from the common flooring that look like big puzzle pieces. The foam weighs practically nothing but is durable and shock absorbent.