If I recall correctly, it should be the fakra connector for the antenna. Here is a link for one on the German eBay. You just need to dig a little deeper to get to the connector.
https://www.ebay.de/itm/BMW-Grundpla...MAAOSwmMNcWpCy
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2009 118i Monaco Blue "Maximillion"
2009 335i Saphire Black M Sport "Leopold" Cobb stage 2 aggressive tune, Mishimoto FMIC, Cobb charge pipe, Cobb catted down pipes, Forge diverter valves, BMS inlets and DCI, Cyba scoops and M Individual Audio retrofit and M3 gauge cluster retrofit.
2011 328i Titan Silver M Sport "Franzel" <--Wife's car