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The easiest way is to connect it to an Atlas controller and run wires from the output of the selector switches at the top edge to the blocks on your layout. Without a controller, you have to run a wire from your power pack to the A and B inputs of the selector on the left side. The other wire from your power pack will have to be connected to the common rail. - Ed <br /> <br />Let me know if this is not clear enough.
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