I just happened to love looking that the old technology and here is a picture of the inside of the patch panel.  The box upstage that held this thing could have been someones home.    
As you may or may not know this picture is where we see the fact that the patch panel has been quickly disconnected and the cables that connect them to the dimmer room have been cut and pulled out.  This means that the next time we turn on stage lights it will be from a new set of dimmers
I like this image of the poor obsolete quad boxes as they lay on the floor soon to see their demise to the giant cable cutter
Not only was the second electric finally cleared of its little floating and biting electrical current that liked to attach itself to the human body when we were hanging the electric and we actually had the breakers off, but now the asbestos covered cables have been pulled out.