Ballast resistor

Your new harness should have a 2 wires to connect to a ballast resistor. It should be mounted just under the seam of the windshield cowl and the firewall as far to the left as it will go until it's basically up against the fender. Look for a bolt or a single hole where a bolt will hold it to the firewall. If you have an ignition like you pictured then somebody has switched your stock 67 setup to a later electronic. They probably used the mopar kit that includes the box, distributor, and a plug in wire harness. If so then it should plug into your replacement harness the same way. The problem is that it seems maybe somebody messed something up or did their own creation. If the ballast was removed its possible it already has been converted to a pertronics or HEI style or worse was a conversion of a conversion.
I think you are doing good, working with something not near as common as around here, and dealing with translation. Your car is looking good! I like the stance. You will get the wiring, it's about as simple as wiring can be from the factory at least.