Windshield Wiper Electric Motor Slide is a low-cost item that should be replaced regularly. Since these under-the-hood connections are plastic, they are prone to heat deterioration and discoloration. Don’t let them break unexpectedly. #211A will work on any 1955-1956 Chevy model with an original electric wiper motor.
If you have the windshield washer option don't forget to order #211B wiper motor slide washer adapter.