29 Tudor ignition coil question

[fred93]

I am putting things back together after a 6 year battle with health issues. I am getting ready to connect wires to the coil and I noticed that the coil that was on the car when I started restoring it does not have any markings as to which is + or - Is there a problem if it is connected to the incorrect post? If so, how do I tell which is which if they are not marked? I know that the system is a positive ground and I have a wiring diagram, but the coil not being marked makes me wonder!