12.95 V when the car is not running is too high. The battery is toast.
On the mega fuse, the main cable coming from the alternator should be on the post towards the radiator. All other wires should be on the engine side of the fuse.
On the mega fuse, the main cable coming from the alternator should be on the post towards the radiator. All other wires should be on the engine side of the fuse.