Another alternator problem

One wire is pretty simple. IF it is actually hooked to the battery and IF it is getting spun fast enough it should charge. otherwise, something wrong internally

So double triple check belt tension

Put a meter on the output stud. If it won't "come up" rev it up smartly and see if the output comes up to 14-15V. or more then you have an open between the output terminal and the battery

I'm not familiar with these. Is this the one with the little rectangular VR bolted to the outside? If so make sure it is tight, and has not been damaged.