SeeMeCNC Rostock MAX v2 Assembly Manual page 91

You'll need to pair up a black and red wire and then spindle the end as shown:
Do this for the other black & red pair and then spindle them together with the 22ga wire. This
whole bundle will go down the center of the next aluminum tower extrusion. The twisted wires will
help make sure that all eight wires make it without any problems.
When you've pulled the bundle through the tower, identify the black & red pair that you tied the
knot in and tie a knot at this end as well.
Rostock MAX v2 Assembly Guide
Fig. 6-5: Twisted fan wires.
Fig. 6-6: Threading the Extruder & Fan wires.
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