I used these connectors. I think there should be a wider terminal for the areas where 2-wires connect, however I was able to get them to work. I soldered the connections and then used heat shrink.
At one time there were double wire connectors for Packard 56 and 58 series terminals.
Some are still available.
See the second one from left in the photo - and the ones in the table with a (2) next to the wire gage. Sources for Chrysler type wire terminals