1972 Dodge Dart Swinger Odd BUZZZZZZZZING Noise & Seat wires?

Those plugs under the seat are for the seat belt warning light (my 75 Swinger has that light in the instrument cluster like yours)....... I pulled all my wiring out for it, cuz it's annoying, and I'm not doing a factory restoration. There should be a small metal strip attached to the bottom of the seat frame with those wires coming from it.......