It does not have a brake light I have noticed this evening that the two side windows in the boot have demisters on them I presume the two wires each side link up the three windows

Hi I've just bought a 1998 discovery and noticed on the rear window there are four wires just hanging two each side not connected to any terminals I don't know anyone else with a discovery that I can look at to see how they conect to the glass can anyone help ?