What antenna do you have?
Make sure you get a magnetic one. I have found on previous retrofits for people the best place is on the metal A pillar under the trim. Completely invisible and It's easily routed down side of dash then above the footwell and into the CIC / CCC / NBT enclosure.
Either that or run it to the OEM location on the roof and glue on a shark fin. Means cutting the roof of the car though
