A cable backplane system includes a backplane having a plurality of openings therethrough and a cable rack coupled to a rear of the backplane. The cable rack includes a tray having a frame surrounding a raceway and a brick held by the tray. The brick has side spacers at opposite sides of the brick and plates coupled to the side spacers that support a plurality of cable connector assemblies. Each cable connector assembly is positioned between and supported by corresponding plates on opposite sides of the cable connectors with the cable connectors positioned in corresponding openings in the backplane. The plates each include a hem folded over at a rear of the plate. The hem has an edge positioned rearward of the cable connectors and supporting the cable connectors from retreating from the openings in the backplane.