Park / Neutral Shifter Switch Wiring

I am still considering running a kill switch on my 2016 Tundra and weighing options.
I read that an easy location to tap into would be one of the wires on the shifter (park/neutral switch) .
Where if the hidden on/off switch was activated , and someone went to turn the key , the relay wouldnt get signal to turn on because that wire was interupted (switch) , so no power to the starter because it thinks its not in park or neutral.

Out of curiosity, I opened the top of my console exposing the shifter, but didnt see any wires coming or going to it. So my question is , is there a small wire harness on or under the shifter somewhere? or is it under the truck on the side of the transmission ? and any idea on wire color?


2016 Tundra 5.7 4x4 Limited with floor shifter