2008 Big Bear 250. I recently purchased this ATV and just finished a top end rebuild. I noticed oil coming from a threaded hole around the crankcase by the area that I think the starter recoil would go. Not quite sure what should be here. Please see attached pictures pointing to suspect hole. There are a few other threaded holes around the same perimeter as this one. Any idea on what I am missing here? Do I just need to plug the holes with the appropriate screw/o-ring? I appreciate any feedback.