What is this part called??? Help

1971 dodge dart 225 L6 with automatic tranny...
So I jumped the Dart with another vehicle and pulled a rookie move by jumping it BACKWARDS for a split second. Now vehicle has crank but no start but IS getting fuel. Now I have no spark from coil and I think it's due to a part I can't figure out name for. It has a small wire from positive cable going to it then has wires going go ignition coil. What is this or does anyone have any suggestions? On fender well (location)