[LATECH]

No Lights/headlights either?

Sounds like a fusible link, or the connector on the bulkhead.

Look down on the starter for the fusible link. Might be burnt.
Bulkhead connectors can be an issue.All the power to the switches/lights etc has to go through there.
The alternator big wire most likely has its own fusible link/ connection at the starter.So it could be hot, while the rest of the car has no power.

You could turn on the ignition and the lights, while the car is dead. Then carefully go around the harness and move the wiring around to see where , if at all, things come to life. We call this a wiggle test.If there is a loose connection somewhere and you wiggle the harness close by, it may power up,or flicker, giving an indication of the location of the problem.

Also a fusible link may be burnt.It is a wire tha burns in half,like a fuse when a short is present. When you see it, it may look OK, as the insulation doesnt always burn off, but if you pull on it and it stretches , the wire iside is burned in half. It will be on the big lug on the starter.