300zx electrical issue

[HeWhoKillz]

Hopefully someone understands my jibberish. Ok so I have an 85 300zx turbo 5 speed. The alternator is down at the bottom on the engine on the passenger side. On the back of the alternator is a plug, a big nut and a small nut, each nut has its own connection to somewhere up top. The small nut has two black wires that come from somewhere up top and then are held together at the base close to where the nut is. One of these little black wires is broken, right at where they are both held together. I don't know if its a small rubber band or maybe a metal crimper of some kind. It isn't possible to access the other end, the end on the alternator to splice them together. I'm going to guess they will have to be spliced back together. What should I do?