Hi there, I got a completly dissambled Xperia Z Tablet, replaced the screen, put all the parts back in their right space,...

Hi there, I got a disassembled XZ Tablet. However, I`m clueless about one last part. It has a white adhesive tape on the...

after putting it together and turning it on the led went on, right above the volume rocker...well, there´s the right place for this piece. Thanks @ Josiah Crook and @ Ben for your help. Without it I´d not know what the piece is good for.