horn not working

mind you this is a 71 challenger. hope no one scolds me for being here.

So I'm working on a couple things. I'm not sure how these things work.

All the horn and wires seem to be in the engine bay with the one wire looks to go into the panel mounted in the fire wall. So it looks all intact.

As for the inside connections i have no clue where to start, other than tear the wheel apart.

I started to take things apart as far as i could.

Here are a couple pictures of that i'm dealing with. I was looking for a broken wire or something. but not sure how to diagnose it from here.