Anyone know what this female plug on the radio head unit is for?

Joined
Jul 3, 2025
Messages
25
Trying to figure out what the small female plug with the white end is for. the faceplate says it’s a kenwood kdc-225mr , I looked up the manual for that and it doesn’t show it. Just curious what it is. I don’t think I need it as it doesn’t appear to be an aux input. I ordered a Bluetooth adapter off Amazon that connects to the 13 pin connector. Just curious! Thanks
Picture of connector
 
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