So i took apart my primary cover to replace the starter, and i think i stripped the stud/nut on the bottom left side by overtightening it. Can i just seal it up around the stud with some RTV or do i have to take apart the whole thing and rethread it?? any idea what its for anyway?

https://i.imgur.com/sTaQnOC.jpg

http://imgur.com/EPiJ4es.jpg