This is what I have. The slightly raised bit looks like an integral part of the carpet, after considerable force with a screwdriver was applied it did pop out. There was nothing in the hole, but after poking a finger in and fishing around, I found a wire with foam over the end. It’s clearly not designed to be removed. There’s no rubber mat either. It’s also unlikely I could get the leverage to pull the wire. I’m just trying to establish if something is missing or is this just the transition between design. AFAIK even the older design had some form of functional door release?