I think I might see some specks here and there that "could" be mites, but I still am not to sure. Do you see those specks moving? If so check close for mites on a dead prey item somewhere in the tank, or maybe grouped by the water dish or other area of moisture if there is one.
If you dont see them there, check at night with a flashlight. You should be able to see little glints of the mites reflecting some light back at you. On the upside I have never seen mites settle in the area you have pictured. They normally move in on the mouth parts and sometimes the book lung areas but I have only seen that when the outbreak is massive.
No problem. THe only reason I would think they were mites is because you asked me too. If you just posted the picture without saying anything I would never have thought mites, so I think you and your T are good to go.