Battery not charging where is the alternator fusible link located?

My father in law's car isn't charging. The alternator tested good, belts good, cleaned under the hood grounds, cleaned battery terminals. The 20-amp fuse is good, but I go zero volts across the fuse with my voltmeter. I wanted to check the 140-amp fusible link on the theory that if it's blown the ECM won't put power through to the alternator telling it to charge. The link should be pretty obvious, but I can't find it anywhere! If you could help with that it would be great. The next thing I would check is continuity from the component side of the fuse to the alternator. If there is something else, I should be checking, or something I'm missing, that would be great too.