Sorry rear tire carrier.
You can run it a few ways. You can choose to run it along your cage then down and out the back or run it from your mirror along your windshield down your A pillar and along your passenger side floor boards then back up and around your cage then out. One of the biggest things is what to do with the excess. You don't want to coil it up or wind it up in any way. The best thing to do is spread it out evenly or find a way to route it so it uses the entire length. To make tuning easier most coax cables are in 3ft increments. Most go with either 18' or 21' for JKU's. I personally use an 18'. The more you wrap your antenna up with the more interference it may receive. I have mine run along my passenger floor up over my wheel well and out the back. I do not have it intertwined with my stock harness. Hope this helps some if any haha.