Welcome! I know you will enjoy your 2x.
Pull one of your catches out and take it to any RV parts place (Camper trailers, etc) and they will have a locking latch to fit. I found one on the internet with a combination lock so I wouldn't have to worry about losing a key.
This link will show you what I mean. You just need the hole size.
This is a link to the combination locks.
I have not used either company. I just added the links so you would have an idea of what to ask your RV dealer for.
Again welcome and enjoy your ATV!
Jack, I was wrong. Sorry. I went to my RV dealer today (and looked and looked online) and everything they had was the wrong size. My RV dealer really tried to help. 1200Bruce may have the only lock that fits. He is normally correct. If I find anything else I will let you know.