...I remember seeing those things when I was a kid in the early seventies...I thought is was just a fad...seemed like every big car had two of those things attached to the 200lb chrome bumper, it plain view for everyone to see. Hah!
I'd try to hide it somewhere near the rear axle...come to think of it, I think I saw some on sale at a larger Auto parts store, give a few of them a call and see if they carry them....you might be 'shocked' and amazed.
I hope you didn't find that pun too reVOLTing.
-Larry (chanting OHM...OHM when I meditate) :p