... elements, all of which are gold plating.4. The shell of the products is nickel plating or cadmium plating, ... SD X M – G n P BD: shell locating rectangular connectorX: type of shell-E, A, B, C, DM: ... -bent panel connection, no mark for welding wire type Note: The shell No. is corresponding with the number of ... contact element. For example, the number of shell E’s contact element is 9, the number of ...