Quick alternator wiring question
 

I have my S6 alternator wired like this:

https://www.rx7club.com/attachments/...altinstall-jpg


The thick wire going to the battery and the small wire going to the battery. This is what the picture says, yes? My Haltech says my idle voltage is 10v but if I rev it up it goes 13.5 or more. This would indicate I wired it correctly and that my alternator is dying, yes?