FWIW, when I moved my battery to the front, I installed a knife switch disconnect in the negative cable. I have an Optima battery with both sets of posts. The switch is clamped to the top post, and the ground cable attaches to the other side of the switch. Advance Auto is where I got mine.
BTW... my ground cable runs to the bolt that holds the brake booster to the front bulkhead. I also have two grounds on the engine. One from a bellhousing bolt/stud to the left hinge box, and one from the rear head to the shock tower/dogbone bracket.
I did not "home run" the ground cable. My 2009 Challenger had the battery in the trunk. The ground was connected to the body of the car. Worked fine.