Starting on my dual battery setup in anticipation of installing a winch.
The few pics I could find of the factory dual battery setup showed it running over the inner guard however my snorkel setup and catch can would have blocked that.
Whichever way I went I would have to make a tray to suit so I ended up mounting it parallel to the firewall as that cleared everything the best and allowed me to fit the biggest possible battery. Made the tray out of 1.5mm with a base and legs out of 3mm that run back to four factory captive nuts in the guard.
Have been doing quite a bit of research on battery controllers - tempted to start with a simple physical switch and then do some more research on controllers. Anyone here running dual batteries?