Instructions state prepare a three core electrical set with plug. Okay
Loosen the two copper screws marked with "V1 W1 & U1 and fasten the electric
Power leads to them.

But which one is hot(Black) and which one is Neutral(white) or does it matter.
I know where the terminal for the green ground wire goes. 110 volt motor.

There is another terminal they do not mention it the instructions v2-U2
Sit away from the rest? Must be for something else?

Sounds like it's a 220 volt motor. Which motor is it?

Is this the pump you have?

Instructions apparently written in another language and translated to English.