Fine on the wiring diagrams but it still doesn't tell me what you have. The wiring diagrams are for 4 different styles of robotics. Notice the top diagram says it is for a 6vdc/1.8 amp wall pack power supply and the ones under it are diagrams for 7.5vdc/1.8amp power supplies. The only place it indicates use of a battery is when you have a 6vdc power supply and in that case you need an additional 9v battery. Just so you may understand the diagram a little, notice on the left side of the diagrams it looks like a "C" with a tail on it. The tail (like an upside down tree) is a symbol for "ground" or negative. Everywhere you see the upside down tree symbol (thats the best way I can describe it) it means that is where a wire (usually the black one) is connected to the negative terminal to complete the circle of the circuit. The "C" is a pictorial symbol for the plug and indicates it is the outside metal surrounding the plug which is negative or ground. The dot in the center of the "C" is the center of the plug and is the positive (+) power input. A wire lead from the positive side of the power supply goes to one side of the switch (we won't get into switches and just say it is a single pole/single throw (spst) switch) and the other side of the switch is where power is hooked up to run your project. Remember I said the red wire is positive and black wire is negative (ground). Now since there are several diagrams which are apparently using different components there are several ways of hooking up power using a 7.5vdc/1.8amp wall pack. That is as far as I can go not knowing what you have. I suggest that since there is an e-mail address for contacting tech support you that get the correct answer from them directly. E-mail address: [email protected] (First page of the manual) Or call them if you have to, shouldn't cost much for the call and they can have you up and running in a short time. Again, sorry I'm still not able to give you the answer you are looking for but their tech can do it. One more thing about the wall pack (wall wart) power supply. Depending on the output voltage, the size of the plug will vary. Anyone at Radio Shack can provide you with the power supply and matching female plug or match a female plug to a power supply you may already have.
Marv