From the 69 Shop Manual and the bracket in my car. FWIW; On my car a flat washer, 3/4-1" diameter, was under the original carpet, at the tunnel, and in place of or on top of the 'sealer' as shown in the diagram.. Also of note, on my car, the original carpet had a horizontal slit. Just wide enough to get the flat washer onto the tunnel bolt connection. Brian