My car had a toggle switch mounted on the shifter down low and up front on the opposite side of the shifter for operating reverse when backing up and or having to turn while backing up when I bought the car, it works great
Almost fool proof,
I have forgotten to push it off when I'm in a hurry to get in the staging lanes backing out of my pit spot, it won't go forward with the switch on and the shifter in low gear
My trans brake button is on the steering wheel for hands free from the shifter launches