Electrical connector diagnosis

[Final777]

Okay I'm back again with yet another problem again that I have run info on my 1986 ranger. On the driver side under the hood you have some big kind of block like electrical connectors. Well a fusible link caught fire on me and the pin thats runs into this connecter is what I need to fix. But exactly how do I go about doing that? I have tried buying things called furrels, I've managed to repair the original one and put the wire back in it but it's come back out again and I don't think I'll be able to repair it I've also used an electrical connector for Ford for the part but every one that I've used doesn't want to go all the way into the slot and stay in place I also cannot find anywhere to buy fusible links anymore they do sell people link wire do I need to replace that with the fusible link wire or can I just run like a fuse to it in between or should I just run the wire by itself please help me I just don't know the best way to replace and fix it. Can anyone please help me out give me any tips at all