Even if you found a mating switch, the other end of that is not connected to anything.
Toyota uses the same wiring harness in multiple vehicles.
This can sometimes be convenient because optional items can be installed quickly in your driveway... on Canadian-built Rav 4.4, installing the TVIP systems takes about 10 minutes to install both the alarm brain and the glass breakage sensor.
Same goes for installing factory fog lights in SOME models not equipped, cruise control on the regular cab Tacoma, etc....