We use these Deutsch DTHD connectors to supply 12V into switch panels. They easily handle the electrical running load of the typical modern race car. Since they are available as free or bulkhead connectors they are easy to make part of a tidy installation. These connectors utilize the same dovetail mounting clip as the DT, DTM and DTP connectors.
The contact is sized for 6 AWG cable and rated at 100 amps. Inside each socket, there are 6 robust fingers that do a better job of mating with the pin than any other system we have experienced.