If memory serves, only the RKE has the battery saver function. Leave the door open, and after a half hour or so, the dome lights should go out if you have RKE.
Other than the jumper connector, look directly behind the pocket to the right of the steering wheel. From underneath the RKE module will have three connectors. Two long ones side by side and one longer one beneath them.
I have all kinds of pics of the PCB's inside, but nothing of the outside