I've found that a lot of parts are standardized across all sorts of things from vehicles to furniture to appliances and electronics. Holes or tabs may be used on some versions but not others. Mine has a couple of holes and cutouts in the dash cowling that have blank plates installed. No idea what they might be intended for. The holes you see may be used on some other model tractor or for some option you don't have. If they're placed right, you may be able to use them to mount something like a winch.
Thanks for the responses - LD1 you were right on the money. After your post I did some digging on the mounting of the BH75 and that is where some of the BH frame members mounts.
Thanks for solving the mystery.
Ray
PS: I just realized I should have posted this in the Kubota forum...