Connecting a 12V 4 pin part fan

Hi, my build is coming along well - just the part cooling fan - delivered with the original kit - remains. It comes with a 4 pin plug I will probably need to cut and extend. I found some hints how to connect this type of fan to the octopus 1.1 but those are partly contratiting each other.

Has anyone done this step successfully and can tell me to what color (we got red black yellow blue) goes to that pin and how to set the relevant jumpers?

Thanks!
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