1974 Dart Special Edition rewiring question

I'm missing the female end (white connector/harness) for the 74 seatbelt interlock. I'm trying to get my car running and am thinking that portion has the wiring/connectors to hook up the coil, voltage regulator, alternator and there seems to be a couple other items as well.
The 74 wiring diagram as you know does not cover this so the get a service manual reply may not be valid. I can tap into the existing male end/harness and get it done,but have questions about the rest of it.

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