70 duster question

No problem. If you refer to the diagram you should be able to add the appropriate wires to your harness if they're missing. (It's right at the top of the drawing when it opens). You need wires to run from the NSS though cavities C&D of the bulkhead connector. Again, you can probably scrounge a NSS harness from a donor car. The other two prong female plug may still be on your main harness near the bulkhead connector.