Anthony, congrats on ownership of a Leisure Travel Van Free Spirit. I'm a Free Spirit owner, too, with the optional 2nd coach battery.
The Sprinter chassis/engine battery is under the driver floor. The 2 coach/camper batteries are in the engine compartment and in the rear driver side. It's confusing that the coach battery is in the engine compartment, rather than the chassis battery. Here's link to 2011 LTV Free Spirit Owners Manual. https://cdn.ltvdns.com/leisurevans.c...S%20MANUAL.pdf
Note the coach battery locations are different than what the manual describes.
I hope you enjoy your Free Spirit as much as we have enjoyed ours. It's a great rig, with a workable floorplan, reliable components and good craftsmenship.