With the rear spar set the next and last attach point is the forward bracket that hooks fuselage to the tank. This is a break-away attachment so if you land in trees the wings break off and fold backwards.
I bolted the bracket to the fuselage. I had previously drilled the holes and brackets on the fuselage side. The bracket didn't lay flush on the tank bracket, but with a slight bend it did. Both sides of the fuselage needed about the same amount of bend to get the bracket laying flush on the tank bracket.