Another ammeter bypass question

Great question, the fusible link went because I did something stupid, caught that. Well I was going in to replace it I started tracing wires and found all the damaged wires and melt damage at the bulk head from the other wires. Looks to be old as far I can tell. I also had a bounce on the ammeter needle.
Before I damaged the link I went out to get some beers and it died, long story short got it home and here we are