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.
Adding the bottom of the intakes will make it a little hard to seat the wing on the wing sattle, you may need to clear some, I repeat, some wood from the WJ2/ WJ2A to allow the wing to seat all the way down without having to push it to hard.
I hope this is clear enough