There seem to be precious few photos that clearly show the cargo area, but in the ones I've found, it looks to be up high behind the driver's torso and shoulders, more or less.
Moreover, there doesn't appear to be a meaningful ledge or wall to separate the cargo from the passenger compartment. (In my present hatchback, the rear seatback serves this purpose, unless folded down.)
Might there be good places to attach a cage or netting? I'd like to make use of that cargo space sometimes, but I want to make sure my parcels won't shift forward dangerously if I have to use full braking authority.