I would reccomend that Molly gets fixed, she could be going into heat which is causing Moses to pee. I would also take Moses in for a vet check because his peeing could be cuased by a UTI. I would also reccomend putting some scratching posts in the warehouse for him. If he doesn't have anything at all to scratch then it's only natural that he would want to scratch things that he shouldn't since he doesn't have anything at all to scratch on.