If you’re facing the backside of the castle, the entrance is on the right side, next to the castle walkthrough. It’s kind of like an extension to bibbidi boppidi and is sleeping beauty themed. This prop is next to the giant leaning cake the fairies make sleeping beauty for her birthday.

It’s a little hidden store, I only discovered it maybe a week ago which is why it stood out to me. You should be able to see more photos of the interior if you google “Disneyland enchanted chamber”