Please help! China Android radio no reception

Hello together, I’m new here in the forum. I hope I ask my question here in the correct “department” of the forum. I have seen that someone has already installed such a “Chinaradio” on his mini, but unfortunately I haven’t found it. I have installed a new Android radio in my R 56 Mini Cooper S year 2011. It all works, only that I don’t receive any radio stations and it just rushes. The installation instructions were unfortunately not sent along and the Suppo rtabteilung of the company now ignores me after a one-week to and fro written haha. I found out that the minis apparently have a signal amplifier or something in the kind on the antenna on the roof and that this is supplied by the original radio directly with power and that this the aftermarketradios probably does not do and therefore the reception is so miserable. However, one can counteract this with an installation of a phantom feed adapter. n Radios, however, comes directly out of the antenna plug still such a blue cable with and looks actually exactly like with the above-mentioned adapters (but with them it should be connected to the current). However, with mine this has no such intermediate piece as with the adapters, which you can buy otherwise. So I did not connect this blue cable, because apparently the radio can break, if there suddenly current flows from the antenna into the radio. (The Phantoms Feedera dapter should apparently avoid that current flows to the radio but only to the antenna) I have attached an image on which you can see the cable well. (the blue one, which comes directly from the plug of the antenna.) On the second picture no. 27 (I don’t know what Auto ANT should stand for or where you should connect it) I don’t know if someone knows about it or has already installed something like that, but I would be really happy if someone could help me. I’m just buying a phantom feed adapter, because I’m sure I’m not destroying my radio Thank you for your answers.