Positive Ground

If your car has a Negative grounded battery. The minus or negative post of your coil always connects to the distributor.
If your car has a Positive grounded battery. The positive side post of your coil always connects to the distributor.
Easy way to remember is !
Positive ground-Positive to Distributor
Negative ground-Negative to Distributor.

The coil will work eather way. BUT it works more efficiently if the ignition wire (hot) which is minus goes to the minus side of the coil. The reverse is true for neg. ground. In other words just trace the hot wire.

Well, here is a question that has me puzzled, and it doesn't really have to do with my Auburn. I have a 1955 MG ZA Magnette that I am restoring, and it has a "Positive Ground" system. The original coils were not noted + and -, but had typical british cryptic notations. The new coil I have for it has a plus and minus, and so I am unsure where to connect the leads. Where does the + coil wire go on a positive ground system? (I assume that the MG and the Auburn are the same in little else but this regard). The MG people are in total disarray and confusion about this. Can the Auburn crowd shed some light? Thanks! Lee Davis, Albuquerque