Grr, that's not very smart. Well at least I found where they were supposed to go and plugged the hole. Thanks.The caps were supposed to be installed by the dealer - and DO NEED to be installed. They cover holes in the frame members that were used for shipping. Dumb dealer.
Ahh I see. Thanks!The skinny storage is a side effect of the hybrid battery being under the rear seats. The don't fold down flat and the "shelf" behind them is an extension of that. Not very useful save for maybe a flashlight or small first aid kit. I might store cargo tie downs in there.