The two scars on the muzzle are on the right side of his muzzle starting up near the eye and descending down across the length of the muzzle. (I can't believe I just used muzzle three times in the same sentance) His left ear is a little chewed up with about three visible niches and some smaller cuts. The scars across his back aren't visible beneath the fur, and I never had any real thoughts about them.
BTW, the questions are great! Makes me feel like I know what I'm talking about, and a little special...