honestly it is not that hard what so ever look at my gallery i did not relocate but i have an extra battery in the rear. I ran a new 1/0 gauge power and ground wire from the front to the back. I use kinetik side terminals to attach the wires for the front and back together. Both wires go down the passenger side and their is a nice opening on the back wall close to the gas tank for you to fish the wires through. I fit 2 1/0 gauge and i bet i could fit a couple more through the opening. Then i added a second ground in the rear to the stock grounding point on top of the pass wheel well.

make a battery tray tie down and hold it in place towards the back their is dead space by the tail lights. If you buy a new sealed battery you could slide it into the slot sitting long ways instead of normal position since the dead space is taller then it is wide. With sealed batteries like optima, kinetik, you can run them in any position.

i have not tried this but what i plan to do is remove my front battery which is kinetik 1800 and run only the kinetik 800 in the rear for weight reasons.