Where is the Negative battery cable grounded to on 13 Rubicon jku
 

2013 Rubicon jku been trying the track down where the negative battery cable is grounded to with no luck I'm currently stripping back the millions of layers of tape to try and track it, I have seen tons of left rear engine compartment but that really doesn't help, photos would be appreciated , I'm at a loss right now lol

Do you have a picture of what you have traced so far? I was pretty sure one of the lines coming out out of the terminal clamp was grounded to the chasis under the fuse box. It looks like the other line might shoot off back and down behind the passenger side valve cover and head. I've never had to trace this on my 3.6L but am now curious as well.