Boards look to be clean.
Pretty sure that loose connection is for the knocker.
Hey out of curiosity, when does this cable get plugged in?
Does that mean I have a knocker already?
Knocker assembly should be up in the top left hand side of the backbox.
Are you getting the 'crack' of the knocker with a free game or match? It was disconnected on many machines..
Take a photo of it if you're unsure. Generally there is a two pin molex connector and two wires going to the knocker.
It seems that a lot of European sold machines have the knocker disconnected or sometimes removed. So it may be there, or not. The only way to find out is to look for it - you are looking for a coil and plunger.
But if the wires are already there you may be in luck. It's always worth hooking up the knocker as nothing beats the sound of that triple knock when you beat the high score.
