How to make your own "Power Routing" Turnout

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Thanks to Paul Smith who reminded me of this.  Let's say you have a dead end siding like I show above on my layout.  You can easily pull in a small engine and car and "park" it on the siding by shutting off the power simply by throwing the switch it came in on back to the straight position.  The switch can be manual or powered it makes no difference.  The "power routing switch" automatically sends power to the siding when it is moved into the curved position.   To make all this happen you only need to turn the switch over and remove the terminal screw (See small red arrow)  that connects the main rail to the rail points or movable section. (I think this is called a "frog" but I am not sure).  The important thing is that the only time the siding will pick up power is when the switch is turned back onto the siding so that the rail point physically contacts the main line rail (Blue Arrow).  Now you have a "power routing turnout" or a "smart switch" that turns the power on and off for you automatically.