I have already some of the pictures you want to see, what it is, that WJ2A locks the dowel to WJ2, WJ2 has an elongated hole, WJ2A has a round hole, once you have secured the wing to the fuse with the nylon/metal screws then you fit WJ2A, you may have to trim the top a bit ( looking at it upside down ) so it can slide on the dowel and clear the bottom end of the fuse that gets glues to WJ2.


I hope this is clear enough