Something missing from alternator?

Hi all, car is only need to us and had been sitting for quite a while before we bought it. New battery.
Alternator is not charging battery and I noticed this greasy thread on the alternator with nothing attached to it. It's towards the top of the alternator, towards the front.
Is anybody able to identify this? Might be nothing, but might be something.


The big greasy thread you are talking about is where the big red wire coming from the battery goes.

You would probably be best to clean that thread up and make sure contact is being made correctly with the big red wire.

Might help to explain why alternator is not charging the battery.

It does not even look like it has a wire attached to it, just a big blob of grease.