Servus, I’m about to break my door. I’m having a little problem. Look at the picture. Should I stick my bitumen mats up there? Or somehow behind it? Then there would be the electrics and so on. On this yellow edge there was a blue plastic foil stuck on it… over the entire door… for what was it good? Edit: Oh yes. I might want to pull some more loudspeaker cables. How to hang them through the hose at the door?