Anyone one know what this belongs to?

It goes between the seats, right above the e brake handle.
CCL

Its where the seat belts buckle to.
There are bolt holes in the tunnel for it...almost at the rear of the seats, though you can get to it if you pull the seats all the way forward.

You need it for the older style seatbelts, the newer ones use a more modern buckle with a flat tab.
The older ones actually clip to that (both sides) on the round part at the top.

Rich

Thanks!!