u/RobertonVW

https://preview.redd.it/xku8da18he1h1.jpg?width=3081&format=pjpg&auto=webp&s=e00802d491d91a7a480e8ee46ff71921c22cd64f

Is this the rubber cap at the bottom of the rear sunroof drain (near exhaust pipe) that I have read about in threads on the infamous sunroof leak? If so, what is the recommended thing to do with it to avoid blockage? thanks!