i have mine on the steering wheel just so that when you launch it just feels more natural to me, the only pain in the butt is backing up. i knew a guy you wired in parallel a second button on the center console of a vega so he would turn around he could put his right hand on it and look backward.
if you hit it accidentally you can.... i had a customer with a c-4 hit the button at the 60ft mark accidentally and snapped the stator support tube off the front of the trans. And i had another one who ran a glide that accidentally hit it when he rolled in the water box, didn't hurt the trans but rolled over the sprag in the converter so it had no stall to it. easiest way to avoid in a street strip is put an arming swith somewhere