I am installing a factory video system on a 2008 LR2/Discovery 2. As usual, the Land Rover factory Instructions leave a lot to be desired. My question is in regards to the installation of the wire running from the Headrest down through to the seat bottom. it would have made sense for factory to install guide tube running to the seat bottom, but that does not seem to be the case. Does the lower leather seat cover come off so as to reach your hand up to route the wire? If so, how is this done?