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The switches I am using are normally-open, 4 pin, tactile switches. The two sides of the switch are each internally connected to 2 pins. I didn't see any markings on my switches to indicate which pins went where, but it was fairly easy to figure out with a continuity tester (or ohm meter). 2 sets of pins will be connected internally without pushing the switch, giving you a "beep" or a 0 ohm reading on your tester. These 2 sets will be either side of your switch. It won't matter which pin of a particular set you choose to wire to. Maybe the following diagram will help. Pins 1 and 2 would be one side of the switch, pins 3 and 4 the other.
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