What went wrong, fire Options

[914itis]

I decided to install my hangman fuse panel. after installing i started the car, turn on
the head lights - works
flashers- works
turn signals- works
decided to turn on the wipers works, then the engine cuts off followed by a spark on the fuse area. within seconds the wires was on fire. I safely put out the fire.

I then removed the fuse box, to notice that the big red wire was burning, that wire was attached to a brown piece that looks like a breaker. it cracks ast it burns out.

My question is what is that brown peice is used for that has the brown wires attached on one side and the big red one on the other end.. I know that the brown wires are ground.

now that peice is gone what do I do..?
A good portion of the red wire is melted. and I will be inspecting the rest of the wires for burnt.


help!

[914itis]

Update! the batery wire is fried all the way to the battery. I spent 6 Hours removing the wire and inspecting every single wire that was on that batch, There was some other sligtly damadge wire that would probably cause an issue if grounded. I did the repair from the battery to the fuse box. I used a distribution box mounted under the dash nest to the fuse box. The battery wire coming in and the other 3 wires that was attached to the original wire coming out. I also added the 60 amp fuse box by the battery.. There are two other positive battery wire going to the relay box by the driver's side of the engine, I used a one 30 amps fuses for eacch.

I also confirmed that it was a long screw that that I used to crew the new fuse panel that touched the wire on the isolator... DON'T LET THIS HAPPEN TO YOU!

Thanks all for all your concerns and help as always..

Paul