Oil Leak From Grub Screw (2014 T100)

Just bought the bike, I knew it had a small leak but I had previously read about weeping from gaskets so I wasn't worried. However I went to clean things up and I saw oil pooling below a grub screw. Before I try to tighten it I decided I better figure out what the hell it does.
it does look like the gaskets are leaking as well but this one is bad. (or so it looks) I've put about 100 miles on it then decided to inspect it, you can see the oil visibly pooling.

The last image is from a parts place trying to track it down but it doesn't seem to be there or I am looking at the wrong thing lol.

Any help would be appreciated.