So I had a 13 Sahara with Nav and after it was totaled (not my fault) I said I would stick with a Sport to save some $. I bought a 2015 JKU Sport. I have Satellite XM radio but no Navigation on this one and I miss it. I found a guy selling his Navigation unit for $200 off his 2015 JKU. I’m guessing I can’t just plug and play. Can anyone tell me what is needed to make it work? He does not have the antenna that it should come with. I’m guessing I have an antenna for my XM but I’m not sure if that can also be used for the new Nav. Any advice would be appreciated!