Losing switched power and other #$%&^# electrical issues. HELP!

Tab wire from brown along with switched power to MSD box. Starts, runs and turns off. Still not charging. Only 10.6v to the alternator. My brother wants to go to a car show tonight and says cheat and run power from your battery to the alternator. I said no one likes a cheater, and he said cheaters always win. Hard to argue that, so I ran the power. Still no charging and now the car won't shut off with the key again. I removed the power wire to the alternator and it shut off with the key.