I removed The old Scratched touchscreen from the Avic z3 and I noticed that the old one had some kind of gold aluminum type tape on it...its called the insulating spacer and is item number CNN1103...what exactly does that do or does it have to be grounded to a spesific location to the back of the lcd panel....I noticed that it was taped on the connection of the touchscreen but once i took it off now i cant figure out where it goes and what its for...