The BLK wire is ground. WHT/BLU is the illumination terminal. Connected with the dash lights. Fuse F31. C912a. Two terminal plug.
The ORG/YEL wire is the HOT. It goes to the "main" power connector. Fuse F27. C912A. Single conductor in the shell.
If your replacement is an aftermarket, it probably does not have the illumination terminal. If so, make certain the unused terminal/wire cannot short to ground.
Steve