The invention relates to a hydroelectric machine. The distal end edge portion of the harness holding portion is formed into a substantially L-shape when viewed from an end surface thereof to provide an angular portion, and this angular portion is locked to the base portion in contacting relation to an upper surface of the base portion. It is expected that oxides including both nickel and cobalt, or O, will switch between resistivity states at lower voltage andor current than will nickel oxide or cobalt oxide. Other orientations are anticipated including upside down as well as other operating modes such as flash enabled and flash disabled.