Wires all look factory circuits but the small one from the battery was improperly replaced.
It should be 10 gage red wire. That's the main wire for supplying power to the car when the alternator is not (such as when starting).
See if you can read this simplified diagram.
'67 Barracuda Charging System Diagram
You may find some slight differences but '67 Valiant, and Dart wiring are very similar to the Barracuda.
