I couldn't find this in another thread because I'm not sure what to call it. There is a notch in the open compartment beneath the climate controls and next to the aux power plug. It's about 3/4" wide and has a tang centered in it. It looks like it's intended for something to slide into it and be suspended in the compartment. I can't find any Subaru accessories that refer to it. Does anyone know what it's for?