When you have an engine that does not turn forward, running in the opposite direction to the scooter's movement, you can follow a simple procedure to fix this problem. Open the battery compartment, identify the cables corresponding to the motor that rotates in the opposite direction, then identify the three cables of the motor phases (yellow, green, blue), switch the green and blue ones, and check to see if the motor starts to rotate in the correct direction.
If you need more help please review the following video:
https://drive.google.com/file/d/1bBW_F5r9uLLR4y5TS7qdcfiNV2YVh83w/view?usp=sharing