Do you need to water cool erhm a water cooled spindle?!!

[HankMcSpank]

Those are the correct abbreviations for each phase. The forth wire won't be connected to anything.
Just wire to 3 connectors and if runs in reverse swap any 2 wires. . . Thats it.!!

but I don't know which pins on my spindle are actually U V & W.....so was hoping someone could say by referencing from the keying prong? (assuming they are all standard?)