Ryan,
I'm not sure if that hole is meant as a lightening hole or if it has some purpose on the RV-10, but I'm pretty sure it serves no other purpose in the -14 since it's mostly covered up by the 1029C angle. You'll notice many of the parts in the RV-14 wing kit have part numbers starting with '10' since they are common to the RV-10 wings, but they're not always used in exactly the same way. Notice the most inboard rib in the -14 has a bunch of prepunched holes in the aft end of it? These holes are unused on the -14 but was designed to accommodate the flap bracket on the -10. I spent some time scratching my head wondering why Vans prepunched all the holes in a rib that doesn't have a flap bracket, and did not prepunch the holes in the ribs that actually do have a flap bracket attached to them...
Bottom line is don't be surprised to find unused holes in more than one area of the -14 wings, but it never hurts to ask if in doubt.
