Car won't crank, Fusible link blown

I've got the manual, I'll probably get going on tracking it down tomorrow, just putting together a game plan now .
Looking at the fusible link, it needs to be replaced, and I can get the packard 56 connectors, but I'm not sure about that end away from the bulkhead. Does that need to be on the factory style connector, or can I just put new terminals on the wires and heat shrink it? Just unsure of if heatshrink will change the characteristics of the link.