I cannot add pictures here, I don't know why...
Direct links:
https://i.imgur.com/QJkxAVE.png
https://i.imgur.com/fSPduXd.jpg
https://i.imgur.com/kg23y6s.jpg

The heated front could be it...what should it look like on the windshield?
The wiring looks factory. Definitely era-correct wires with black rubber shield/sock on them.