How to retrofit a memory seat in your vehicle.
This video goes over the basics of how a position memory seat works, including the dis-assembly of the leather upholstery and installation of heater pads on the seat back and bottom.
The tan colored seat is just for prototyping purposes.
The doner seat is from a Lexus ES300 with memory function. The frame rails will bolt right up to a Solara or Camry and maybe even an Avalon since they're based on the same chassis.
The seat control unit is located underneath the seat. The wiring is asking for a bunch of switched and constant 12V inputs. These will all be wired to a constant 12V source so the seat will work regardless if the car is on or off.