Where does this electrical box go?

As mentioned above, just a more modern DIN radio and hopefully an amp. I would like to keep the under hood loser to stock at the moment. No one wire Alt. The upgraded VR can wait at the moment.
How is the MAD by pass "Highly desirable?"
Or let me out it this way.
How many amp gauge fires have YOU personally seen? Actual view, not heard, or my buddy's friend and I read somewhere....
I am the second owner of my 67 Notch from new. When I bought it 10 years ago, it had had a wiring loom fire in the engine bay. A battery had exploded and damaged the engine bay and the front fascia of the car. The bulkhead connector was suspect. Don't know the cause and don't care, there are a bunch of threads here about this modification and after 15 years as a journeyman electrician it all made sense to me. I had the dash out of my car and it was an easy to follow and accomplish mod. I also removed the fusable links and added circuit breakers from the alternator to the battery and from the battery to the interior of the car. (dash) Certainly not a necessary mod but one that made sense to me as I had my car completely blown apart and a lot of folks on this forum recommended it. JMHO