I just have to ask why you needed to build a box on the wing leading edge for the battery? I had to look at the picture for several minutes before I noticed how offset it was from the center line. With the length of the nose, and the average size and weight of the Banshee, I would think that there would be a battery available that would mount in a normal manor in front of the leading edge, even if you shortened the nose a bit. I don't fly electric, but have seen many other electric profile models, and don't recall anyone having to put the battery into the leading edge. If a nose heavy condition was trying to be avoided, a slightly longer tail moment and larger tail surfaces would have helped with static balance. Just askin'.
If you must continue in this manor, I would just cut a narrow slot for the push rod to pass through, save the cut out, then complete the wing installation. When all is straight, level and glued in, glue the cut out back in place and fill in cracks and gaps.
Good luck and have fun,
Dan McEntee