The two wires are positive and negative. First connect the mobile phone (if the charger has an indicator light does not need to be connected), and then the negative electrode is temporarily connected to the car metal frame, and then use the positive electrode to (one by one) test the electric door lock on the red or orange line, at this time to open the switch a line has a reaction to the charger, and close the switch and lose the reaction, this line is connected to the right.
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You can also connect the positive electrode to the flasher or starting relay (thin wire), at this time to open the switch charger reaction indicates that the connection is correct, and vice versa to another line. When you're done, consider laying out the plus and minus wires.