Please help to wire up motor

[garage nut]

so for my understanding....

I must use the sketch to determine what number configuration my motor is using.

So because I have no wire connected to the top Rh terminal my plug configuration should be the 3rd schematic
[1, 2, Nothing]
[5, 4, 3 ]

From the wiring received with the motor terminal 3 appears to be the Neutral.
any way to check what wire is neutral?

Thanks Again.