A connector adapted to: (a) extend through an opening in a board to protrude from both a top surface of the board and a bottom surface of the board, (b) secure the connector to the board, and (c) electrically connect a power supply to a terminal on the board. The connector includes a housing having: (a) a leg section, (b) a head section at a first end of the leg section of the housing, and (c) a receiving recess at a second end of the leg section adapted to receive the power supply board. This connector also includes an elastically deformable retainer piece having: a) a cantilever spring section fixed at a first end to the leg section of the housing and adapted to be below the bottom surface of the board, and (b) an apex section at a second end of the cantilever spring section adapted to bear against the bottom surface of the board. This connector further includes an elastically deformable contact protruding from the head section of the housing adapted to contact the terminal of the board.