The yellow wire is ground wire, the gray wire is CAN-High (CH), and the green wire is CAN-Low (CL).
The optional serial communication power system. Yellow, red and green cables are the data output and upgrade signal line (the ESC system is upgradable).
The black and white is the PWM throttle wire, the black wire is ground wire, and the white wire is signal wire.
You may not having CAN-bus version.