Risky structure?

Hello, I’d like to install 10cm midrange driver in Golf IV soon… Since I don’t have any original photos, I have only the following options: -1. Snibble dashboard and let it play against the windshield -2.Make a small case(structure) and align the midrange driver directly on me Only with the 2nd version I still have my concerns…. Because such a construction is quite striking!!! That looks like a magnet on thieves!! And my car is not in a garage ….And also not always in the best areas… I don’t want to find a broken car after 2 months!! I’m totally desperate!… What do you think?? Mfg Olaf