On my ZJ I had it stuck to the right wheel well carpet, and eventually ended up mounting it into the hollow area behind the wheel well hump. (Came with a bracket that stuck to velcro or carpet, so easy as pie.)
Had it stuck to the carpet in my WK, but it was chewing it up pretty bad. No idea where it's going to end up yet.
2006 WK Laredo 4x4 4.7L
1993 ZJ Laredo 4x4 4.0L — Dead, sold, and rolling again