does it matter?
they are all too hot to charge the battery (all are over 113F), so dont leave a liIon on charge in the vehicle, on a hot day
the hottest spot is also above the max operating temp for a LiIon (140F), so dont try to use that light until it cools doewn, or it may have “venting with fire”
otoh, if you neither charge, nor use the lights, at the temperatures stored in a car
then
it makes no difference where in the car the light is…
I hate guessing, so, when youre ready, just tell me Im right… cause I already know where the hottest spot is, and I aint tellin… lol