2015 - 8.4 radio upgrade to 2018 CarPlay radio. No GPS signal

[T Brown]

I own a 2015 Ram that had an 8.4 nav radio. I'm trying to upgrade it to a nav radio out of a 2018 Ram, but the nav system isn't getting any satellite signal with the new radio. I'm assuming the issue is because my old radio shared a GPS / Sirius XM antenna, and the new radio requires a separate GPS antenna. My truck only has 2 FAKRA antenna wires - FM radio (cream color) and Satellite (curry color). The new 2018 Radio has many more FAKRA antenna jacks. I'm hoping I can just buy the required antenna and plug it in. My main question is, which jack is for the required antenna, and where do I buy one? ...And if any of my assumptions are wrong, I'd appreciate any advise from knowledgable members. Here's images of the back of both radios showing their FAKRA plugs.

 

[bloup]

I did the upgrade from 2017 to 2018 UCQ Uconnect and my 2017 also has only 2 fakra cables for antenna and GPS/SiriusXM. For years I had no issues but recently lost GPS signals and spotty SiriusXM signal. I suspect a defective aircard AR7552, waiting in new part to confirm.