The Cargo Area Hatch
Sorry, but I messed up the description somewhat. The hatch from the crew area leads into a lift shaft, where the car itself is stuck at the upper deck. Brent will have to step down into the shaft (about a meter down, and then open another hatch to see into the cargo bay.
Unless told otherwise, I will presume that he made the hop down, which is easily accomplished in the very low gravity. The post, then, will refer to the hatch into the cargo bay proper.
Sorry for the confusion..