Yes, you can use an extension cord if you like. And yes, follow the directions to wire it correctly to ensure proper polarity. Your real question seems to lie with your cord. You can buy one at home depot or comp. for .99 without a female end on it. The wires inside will be colored (the insulated material around the actual copper wire). Just match up the correct wires to the leads, make a loop and wrap around and then tighten with a screwdriver.

If the wires are not separated by color, then you can figure out which one is hot by the male end. You will notice one end is larger than the other. That end will be your..... omg! I cannot remember which one it is! Oh well, good thing you can google it and find out if it is positive or negative.

Best of Luck!

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