Has your car been painted? replace the wiring harness tabs with new soft covers and get rid of the hard crusty old ones.
This is the covering that goes over the metal tabs that hold in the wiring harness. These should be soft but over the last 40+ years they ave become hard and may be missing or painted over. This is sold by the foot and you trim them to install.
Used for all 914 model years, 11' recommended per car.