A method for forming a fiducial and pin one indicator that utilizes a single solder resist opening in a die mounting substrate to perform the combined functions of prior art fiducials and pin one indicators. The treatment consists of irradiating an area of the skin and nails for a period of time long enough to inactivate the organisms. The supply units may contain vital devices such as current collectors, transformers and power converters for extracting power form a contact line and feeding it back into the contract line or converters of primary energy or electrical energy. A modification may be made in which a latch member is provided to at least one of the plug and adapter, a latch engaging section is provided to the other, the latch member is engaged with the latch engaging section, and the plug and adapter are fixed. The common electrode controlling unit controls a voltage level on one of the common electrode lines according to the first output signal, and outputs the first output signal and the opposite second output signal to the next common electrode control unit. Co-functionally, the throttle shaft is rotated clockwisecounterclockwise to control motor speed while intuitively allowing the user to push the throttle in for reverse direction and pull the throttle out for forward direction or vise-versa, based on whether the trolling motor is mounted on the transom or bow of a boat.