https://modelastore.com/electrical/d...roduct_id=4141
This is the wire I prefer. [Since you don't use a pop-out, the distributor can be wired as a more modern car, but, thats your choice] [ key switch before the coil and this wire can then be attached to the coil primary terminal that matches the battery ground.]
Also if using a 'modern' upper plate, I recommend adding a fine strand wire. The wireless plates are troublesome. Other than that they work fine.