I thought I found the answer….but no

No, that is where you get the charge for the alternator, look at the diagram shown earlier...
Hemi, so for me, who I admit am slow. Then I would have a 2 wire? 1: battery 2: ground?
Battery.... it's the charge wire and only wire hence the "1 wire"
are they just after market? Or can i go to Oreilly’s? What do I ask for? Also what brackets do I use?