I'm in the process of installing an older Alpine head unit that requires a Motorola male antenna plug. My SRT-6 has the factory AM/FM/CD Infinity with the Nav system.

Based upon results from forum searches I have purchased and tried both the Scosche VWA3B adapter and the Metra 40-EU10. They are pretty much the same, and neither one matches the antenna plug. It appears these are for non-Navigation system Crossfires?

Can anyone tell me for certain a part number for the correct adapter? I'd really like to buy the right adapter this time so I can start enjoying my Alpine.

Thanks you so much!

Update: I think I may have figured it out and have ordered one more adapter. If it is correct, I'll post the part number for future reference.