a puff of smoke and now nothing 69 valiant electrical issue

where are the ammeter wires?

Attached to the back of the ammeter
upload_2021-3-21_14-58-36.png
i think he took all the wires off except the main harness that goes into the dashboard.

upload_2021-3-21_15-2-13.png
I don't see any melting
Just because you do not see anything melted does not mean that something is not melted.
you might not see this with the covering still attached
upload_2021-3-21_15-4-21.png

what does a fusible link look like (i am a picture guy) near the bulkhead connectors?
something like this
upload_2021-3-21_14-56-19.png