Has someone determined the rectangular object in the SP left hand?I don't think we know all of the security cameras on the property (or do we?) and which ones were working and recording. I would guess that some of the SP footage we haven't seen is from different cameras in the building we don't know about.
For example - we have seen footage of SP from the two cams on the SW side of the building but have not seen any footage from the doors on the other side of the main hallway. One would assume they had the same 2 camera/2 direction set up at the other end. There might be cams on at the other exterior doors as well - and there is space near those other doors to park a car. There may have been one exterior camera at the back of the building that was working and barely caught the edge of the car parked near the kitchen door.
I don't think the car was located in the parking lot. I think it was pulled up close to the building, mostly hidden from the driveway between the kitchen door and the back of the building.
It's really frustrating knowing that the "range" that triggers the cameras to turn on is so much smaller than the visual range the camera captures. If we assume both sides of the main hallway were set up the same, there is a giant "blind spot" in the middle where there could be movement but the cameras would not engage. It's even a larger blind spot if the foyer cameras (from which we have not seen any footage) were trained on the "front" door of the building.
At one point we had a floorplan that estimated camera locations and ranges that i thought was very helpful - but I think the entire back-half of the building was mostly unmarked on the diagram.