This high quality regulator is a replacement for the Yamaha WR450F model. This unit includes the blade male electrical connector terminals. This aftermaket regulator is a copy replacement assembly- bolt and plug.
The factory part may have had these markings on it:
5TJ-81960-02, 5TJ-81960-01-00, 5TJ-81960-80-00, 5TJ-81960-02-00, 5TJ-81960-00-00