A connector includes terminals each of which has a plate-like connecting portion formed with a nut mounting hole. More specifically, there is provided a system and method for delivering sodium ion channel proteins or nucleic acid molecules encoding sodium ion channel proteins to a site in the heart adjacent to an electrode to increase the expression of the same, thereby enhancing the cardiac signal amplitude and enabling improved sensing of cardiac signals by an implanted pacemaker. Then, the coal oil is transferred to a wax liquid temperature control cylinder to control the temperature of the wax liquid so that the wax liquid is retained in a proper temperature for being injected to a mold. The invention also relates to a throwaway or reusable device for delivering at least one therapeutic compound, or a formulation comprising the at least one therapeutic compound to a patient, and a method for administering a drug to a patient using said device.