Wingboy -
You should be aware that the "wings" are not two separate pieces attached left & right. In fact it's a single wing assembly tip to tip (or nearly so) with a huge spar(s) running right through the belly, with the fuselage resting on the spar. Thus the fuselage-to-wing attachment can be pretty light in weight.
Aircraft designers go to a LOT of trouble making the whole structure strong and light.
