The sample handling page at the Mars 2020 mission site shows us the rover with at its front a circle that probably contains the rotating drill carousel ?
However it states that the belly of the rover houses that carousel and the 43 sample tubes and a small robotic arm for moving those tubes.
Is indeed the carousel within that circle at the front ( what I rather would name the chest than the belly ) ?
And are there other, more detailed images or diagrams of the carousel, the housing of the tubes, and the small robotic arm ?