If I do buy this System/36, I need to be able to boot it. A key is needed to boot the computer. The key switch has 3 positions: Normal, Locked, and Service. The switch has to be in the Service position to boot. It's currently in the Normal position. There are 3 wires on the back of the keyswitch. One for each position, I think. Which ones would I cross to boot? +------- Wire one. Normal position. / \ +---------- Wire two. Locked position. \ / +------- Wire three. Service position.