Okay, so here's what I've got. It looks like a couple sub-assemblies.
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First sub-assembly is parts A, B, and C. The long side of support A points aft. Support C has the cutout to allow the wires to pass up the pylon and makes up the top of the Assembly. This assembly glues down to the top of the fuselage between the curves for the tower base.
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The outer skin of the pylon, labeled "Wing Tower," wraps around this sub-assembly and glues into the slots of the fuselage.
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The next sub-assembly is tower supports D,E, and F. E goes in the front, F towards the rear. I'm not positive if they're supposed to mount flush to the top or the bottom of the assembly though.
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My best guess, is that this sub-assembly glues to the inside, top of the pylon to reinforce where the wing will mount.
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The wing would glue in on top of this. I've only duplicated the relevant portion of the wing for this example. See how Support E blocks the hole in the wing? Makes me thing something here isn't quite right and that support E should maybe have been mounted flush to the bottom of Support D. And there is no way to close the gaping hole in the back of the pylon like this.
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And if I have any guess the "Center Wing Support" glues inside the wing to reinforce where the slots are cut into the wing to mount the pylon. Line up the holes.
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That's what I've got. Personally, I feel like there's probably enough strength in the "Wing Tower" alone that you could leave out supports A-F and greatly simplify the construction.