Duster fusible link wiring problem

That's very hard to understand. Your description sounds like a loop. That would make no sense. The only parallel circuit is the ammeter and it uses 20 gage wires. Additionally those ammeter wires should have a stripe of different color on the insulation.
I do understand the fusible links are connected to a wire that leads back to the battery's positive terminal.
If you found two thin wires along the way, then that matches the schematic.
If you also found a heavy red wire along the way, that too matches the schematic. We see that red wire in your photo cf the starter relay; where it terminates with a ring terminal which is attached to the threaded stud.

a. Trace each of the surviving links to their respective connecting wire. The color of the link is not too important. If the insulation got dirty or was heated it could look black. A towel dampened with a drop of soapy water will help clean them. Relative size you should be able to eyeball.
a1. The color and size of the connecting wire is more important.
a2. Figure out where each connecting wire makes its next connection(s). It will either be a spliced junction or a terminal connector. With power off, the connection can be verified by testing for continuity in the wire. Use an resistance scale, or continuity setting on the multimeter or use a test light.

b. Go the the alternator and find the output stud. There should be a 10 or 12 gage black wire attached to it with a ring terminal. Find where that black wire attaches to on the other end. The drawing shows it orginally attached to the same junction as the two fusible links in your photo. Further, that it had a 14 gage fusible link protecting the wire. I don't know if either is correct but that's how I read the FSM diagram and everything else matches the photos you've posted.