This sounds like the abscess drained to the skin in two places, creating a tunnel connecting the openings. The good news is that it doesn’t appear to be connected to the GI tract at all, so it won’t be resupplied/contaminated with stool. I’m guessing that it might possibly clear up on its own, though it could take a while. A gastroenterologist (or perhaps even a dermatologist) could examine it to judge whether it’s better to do something or leave it alone.