Crafted a sketch from a Boeing patent illustration :
This aircraft includes what is called a "pickle fork" fitting at the front and rear main spars of the main wing. In the cross-sectional view, a main spar of the wing is visible, to which a pair of pickle fork fittings 210 are fixedly attached. The pickle fork fittings 210 extend upward into the side wall of the fuselage 204, and thus transmit horizontal and vertical forces, represented by arrows 214, and bending moments, represented by arrows 216, from the wing 202 into the fuselage 204. Because of this configuration, when the wing 202 deflects, as shown in dashed lines at 220, the pickle fork fittings 210 also deflect, as shown in dashed lines at 218, causing corresponding deflection and deformation of the fuselage 204. It is to be understood that the magnitude of deflection of the wing shown and of the pickle fork members 210 shown at 218 may be exaggerated for illustrative purposes.