the switch that controls it is connected to the transmission, likely by wiring, you don't actually need a complete shut off switch,
on the 2010 i believe the display is in the EVIC, not on the upper rear cab on the backside of the CARGO LIGHT like on the 2009.
I don't know where the buzzer connects in
you don't have a back up camera, now would be the time to add it, IF you have a radio with a screen.
both sets of wires for the camera & the sensors run side by side, rear to front in the dash. you would save Labor charges for installation doing both at the same time
this is my dash control for the sensors, the park sense button is the furthest to the right, click on the image to zoom & click on the new image to zoom in even further