Looks a lot like a scratch or a scrape to me. My friends ball had a few spots like that back in the Summer when he escaped from his tank and curled up inside a subwoofer. He latched on to something sharp inside and my friend had to cut it open to get him out. He only suffered a few scrapes. I didnt see the fresh wounds, but I suspect it would look a lot like your pics. After one or two months, they are already completely healed. Last time I saw the snake, the scrapes were barely noticeable, just some light white scarring, nothing too bad though.