Voltage regulator location? Need a new alternator?

Since this was bumped, the fix for my situation was that under the dash, some of the wiring to the aftermarket gauges was loose and poorly run, and there were some crispy wires under the dash that were replaced (fuel gauge works now!), and what I think was the biggest problem was the ground on the aftermarket fuse box was hooked up incorrectly!

Thanks everyone for their input and I hope you figure out your issue Perseus!