Where are you mounting spare 12V battery in rig?

[Ken Sekley]

I'm converting my 2017 Jeep JK into an overlanding truck. I've recently raised it and put 35" tires on it. Now it's time for adding a rooftop tent and additional electrical. I'm thinking for the start a single 100Ah battery will do the trick. But I'm trying to figure out where I should mount this. I will need to have a few items with it. I'm planning on adding a solar panel and Victron battery management system and some sort of charger. My goal is to have it charging when the truck is moving via alternator AND if the sun is out, solar panel that is on the roof at the same time.

At this point just looking for ideas on where to place everything.

Thank you

Ken