UL tests the blank boxes like this. They cut holes in them per the manufacturer's instructions and then installs/seals conduits per the instructions. Then they do their battery of tests for the Listing that's being sought.
If you don't cut holes and seal the conduits the same way, then you will have an installation that differs from the way that it was tested. UL won't stand behind a Listing mark on something installed differently than was tested.
I agree with George; see if the AHJ has any ideas on how to address this without having to redo the whole thing.
