I am going to assume since you are in the car audio forum that you are wanting to install an amp power wire?
If so, go to the battery. Your amp will have more "clean" power if you go to the battery instead of the alternator positive lug. Also, it is waaaay easier to attach to the battery. If you need a pic of the best way to attach it to the battery and a location to run the power wire into the cabin, let me know, I have a thread buried away in the abyss with pics and instructions of where to run the power wire into the cabin. Hope this helps.
If its still in the same location as the 07's , you'll be able to get to that nut from the bottom and on mine I had to kinda notch the ring that's on the wire so it would fit down inside the little plastic thing on the alt.