Yeah, mostly looks like minor scuffs to the scales and no open wounds
Am I seeing a bit of pink on the belly too? If your snake is getting ready to shed, that might be a reason too...the older scales drying out. I'd also double check the humidity in there as well. Sometimes when the humidity levels get too low you see the scales get kinda flaky like that. Offer some moss in a hide maybe to help the scales stay hydrated.
Hopefully it's a coming shed and not burns from the CHE basket being too hot. Also... maybe double check the temps in the enclosure to make sure he's not hiding up there and drying himself out because things are not warm enough elsewhere