Front License plate screws on 2004 Porsche Cayenne Turbo

I was nstalling a new front license plate cover and needed to use longer screws. The screw went through a hose located directly behind the existing hole. What hose is it? It has to be a plastic or rubber hose as it left balck on the screw, it appears to be windshield washer fluid leaking out!

Asked by for the 2004 Porsche Cayenne Turbo
I hate to tell you this, but if it appears to be washer fluid it probably is. I can't think of another fluid in your car that even remotely might be blue in color, can you ?
1 more answer
do you have washers on the headlights?