It's plastic, it's orange and it's above the spare tire, to starboard, on the forward bulkhead. What is it? There's a finger-hole, and you can slide the cover part to the left. I stoped playing with it at that point, deciding to ask before I yanked on it, lest it do something "interesting." I'd do a search, but I'm hanged if I can devise any sensible search terms. I know the 12-v battery is back there, all the way aft, but the manual depicts jump-starting as an under-the-hood exercise.
HV interlock for HV maintenance only. Don't yank it if you do you will loose all HV circuits. To Reset slide to right to lock position restart engine 3 times to clear alarms. Jim
Yes it was I got my sub cable snagged on this while I was installing the sub. Called Toyota and was ready to have the car towed until I double checked the switch and noticed I did not reset this puppy. Really was an adventure I dont want to repeat. Jim