If the airtronic servos are not the real old type they may be wired correctly. If the center pin is positive, you can use them as is by just shaving down the thickness of the plug. I've just used sandpaper (or file) to thin down the ridges on the edge so they will go into the Futaba reciever with no problems. If the center pin is not positive, you will have to move (interchange) the positive and negative wires at the connector.