Designed to adapt a standard SAE 7-pin plug (used in semi truck/trailer connection cables) to an SAE 6-pole plug.
SAE 7-Pin plug - same configuration as all SAE 7-Pin sockets
Adapter has an SAE 6-pole socket on the other end
The marker and tail lights will be both powered per SAE 6 protocol
Fits trailers that have their own cable and SAE 6-pole plug, such as utility trailers and various construction trailers