Quoted from Crash:Perfect! So the key is the spot between the red and blue wires. If your transformer test is good (not a resistance reading of zero on either winding) then I would say you're safe. Line that spot up with the missing pin on the board header with the topmost pin hanging over, plug it in, and turn it on.
And for gods sake order some damn keys! Will save you headaches in the future. Hate when I get a game in with missing keys... They are only a few cents at pbl
http://www.pinballlife.com/index.php?p=product&id=1629
http://www.pinballlife.com/index.php?p=product&id=4168