b's90cam

iTrader: (1)

so an a-hole broke into my house, stole some stuff, and then sliced my battery cables to get my battery out of my car. it sucks.... anyway, i need to rewire the battery cables from the tray area to the battery. I'm assuming red wires are positive and black wires are negative. But it does look like the black wire that runs in front of the engine goes to the alternator. Just wanna make sure this isn't supposed to positive. Also, the other 2 red wires look to go to the AUX port on the driver side and starter. The other black wire goes to the engine block. So.... if thats all right, what's the black wire that goes to the alt?