Finally no more whining from the back seat people about not having a charger...
The top of the plate is what the lift up arm rest is screwed into. The bottom is held to the floor with screws through the bottom of the storage area. If you loose your ground, the bottom is likely the cause. This is because the plate is only held into place with pressure on the bottom (to the floor pan) and minor screw edge contact.For anyone doing this, you should know when you pull the plastic panel off that there is a metal plate behind it that you can ground to.