Not long fitted a kenwood head unit but the standard speakers are ****e. Had a look fitting them in the door but decided I want bigger ones. Am I right in assuming the ones in the parcel shelf are 6.5"? It's a concert btw. To run new wiring from the HU to the parcel shelf, I'd have to take off the lower trim, under the back seat and take the shelf off correct? All of those I have no idea how to do, assuming there are screws for the trims? any help appreciated.