Stacked electrical connector assembly

An upstanding stacked electrical connector assembly comprises an upper connector having a plurality of contact elements, each having a first segment rearwardly therein and a second segment extending downwardly from the first segment, a lower connector having a plurality of contact elements, each having a first segment extending rearwardly therein and a second segment extending downwardly from the first segment, support structure for supporting the upper and lower connectors in vertically spaced relation and having transversely spaced elements extending rearwardly from and vertically below the second connector and contact retention structure disposed between the transversely spaced elements of the support structure for receiving at least the second segments of the contacts of the upper connector and retaining the received contact second segments against both transverse and vertically upward movement relative to the connector assembly.