76 dart sport fuseible links

Hopefull the mess isn't too deep but hard to know just yet from that photo but ...
Ammeter wires are completely gone fuse box hanging under dash.
H'm. So on a standard '75 wiring, the ammeter is a part of the battery feed to the main splice. So the wiring is heavy - 12 ga or larger.
On a '76 a remote shunted ammeter is used. The ammeter leads connect to each side of a shunt. They are only 18 or 20 gage. Hardly any current goes through them.
According to 75 wiring diagram missing a wire to starter relay or is moved to "circuit breaker"
AFAIK '76 uses esentiually the same starting relay and circuits as earlier and no interlock (used in 74).

A1 is from the battery
S2 is from the ignition switch - hot when key is in start
S4 is the ground through neutral safety switch
S5 is to the solenoid terminal on the starter
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Top Cowl - Don't know why its above the flange in 76 but it was.
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