How to unlock speed limit on Inokim quick 4

Have a look at the following instructions provided from Inokim's factory:

He is providing instructions for when the scooter is set to km/h. Since your scooter should be set to miles per hour, you can only increase P2.2 to 25 mph. 

https://drive.google.com/file/d/1mwmsV_gvdrOIfYX1bMgPZb4y1FSthmMB/view?usp=sharing