Before revision: This was commonly used in conjunction with a connector block with two larger and four smaller flat blade connectors with a standardized pinout for power in (main power, memory for radios with electronic settings memory, dahslight power) and out (for an automatic electric antenna).
After revision: This was commonly used in conjunction with a connector block with two larger and four smaller flat blade connectors with a standardized pinout for power in (main power, memory for radios with electronic settings memory, dashboard light power) and out (for an automatic electric antenna).