The casque's sides should be soft. That's a fatty deposit, showing good health. The bone is like an arch that goes from front to back. Someone on here posted a pic of a veiled skeleton very recently. Search "casque" and see if you can find it. Or google image "veiled chameleon", I've seen one there before.
I will do that. When I had him out earlier I lightly stroked his casque and it was soft, I thought I read somewhere that if it was soft that was bad. . Glad to know that was wrong!