Fusable Link

I didn't use the link, mainly because the old one was history, of course, and I didn't have a lot of wire length left. I barely got the two wires close, enough though to crimp them together.

I am using either 10 or 12 gauge wire from the alternator to the battery, while still running the stock wire that runs to the ammeter. The only reason I run the stock wire is that it sends some juice through the voltage regulator and it powers the wiring harness and all of the accessories. Or does it?

Should I run a second wire from the alternator to the battery? Do they need to be thicker wire? Just want to get this straight, since I have all of my lights working now and i just installed a simple CD player with two 6 x9 speakers that get their power from a post in the fuse box that works in the "on" position. Additionally, I run my tach and extra gauge lights through the fuse box. Thanks....