I don't know if the 2dr/4dr JK are the same, but probably are
See that little yellow (foam) hole, that HD is talking about??
Thats the way to the engine comp.!!
I've used a 7-cond. trailer cable to go thru the Drivers side, black rubber covered, (Battery side), so that little foamy hole is pretty good size
There's so much plastic/foam on these JK's you could hide -OH never mind!!