Points ignition wiring question

I hooked it up to the coil on the terminal with the wire leading to the distributor, car runs fine hooked up or not. I did'nt notice a whine on the radio before I hooked it up so I do'nt know if it makes any difference or not. This appears original (looks as old as the rest of the car)

Does'nt anyone else have one of these on there stock engine?