Using the battery platform on the right fender of our 2010 Toyota FJ Cruiser made the installation of the second battery very easy. To make room for the battery I first had to relocate the power steering reservoir. I then used a few sheets of polyurethane under the battery to help secure it in place.

I used the j-bolts and clamp from the primary battery as the hold down.

The auxiliary battery is an Odyssey which provides a very robust durable battery.