67 headliner ...puzzled

The headliner is stretched for/aft and pinched into the "V" cutouts on the top of the ft and rr glass area. The glass gaskets cover up the "V" cutouts. The headliner is glued to the pinch welds on the windlace area then is covered w/the metal windlace molding/trim.

There is a sail panel board affixed to the sail panel area. I guess it's for insulation as the headliner is not glued to it.

The wires you mention (I think) hook onto the rear-most headliner bow.