I just got my black 2.0T today and try to install the 2-Channel dashcam(Lukas QVIA AR-790). that remove from my previous car. The whole process work well until I try to run my front dashcam connect to the rear one. I run the wire over the rear seat headline to the rear beam, then try to get the wire through flexible tube to rear windshield and connect to the dashcam, but I notice the beam that behind rear seat had two nail that punch through it. Are those nail safe to remove ? and how to remove it safely ?