My 2007 Factory Navigation unit is to be delivered today. I have already removed the factory cd/dvd player I had. Can you guys please tell me what all the plug holes are for in the rear?

My set up had 3 plugs when I removed it. I supposed those go in the same holes, only leaving the furthest the right emply. Then obviously the antenna on the far right. What is the 4 hole for on the bottom, the blue looking hole, and the larger hole in the middle?





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I am guessing the blue connector is for the navigation antenna? that leaves the hole just to the left of it, and the larger rectangular hole in the middle?

 

What up B.!?

I know you know what this is by now, but I'm putting this post in for everyone else that doesn't know. First off you know the main plugs on the back by going to THIS POST HERE. The longer rectangular hole is ventilation for the head-unit's fan. The blue is for the GPS antenna, and the the ciruclar plug on the lower right is for the regular FM antenna.