Vauxhall Chevette Viva Firenza Cavalier 1.3 Alternator DRA 3297 Delco LRA143, as titled, also Jensen Healey sport

This was sold to me as a long ago refurbished unit. I bought for my '79 chevette, I came to fit it and discovered the plug for the wires is singular whereas my car has 2 plugs, please check the photos and compare with your car before purchase.