Question how does the pump in an Arctic Freezer ii get power?

[Colif]

Trying to work out how the AIO pump on my Arctic Freezer ii gets power.
I know it runs off the PWM signal but I don't know how it gets power.
Apart from being physically installed on the CPU, its not electrically attached as far as I can tell.

The only two cables that were attached to the AIO were both for the ARGB fans attached to AIO. There is nothing else running to MB.
There is a cable attached to the fans that runs down length of the air pipes that linked the fans to PWM and ARGB headers on board.

But now I have replaced those fans with a set of Lian LI fans that run off their own controller which is attached to those two headers.
Controller has its own PCIe 6 pin running it. I guess it could be power source.

So I know the pump runs at 100% speed at 40% Fan speed, but where is it getting power from?
I have to assume its the motherboard but not sure how its getting pump to work? How does the pump get the PWM signal? Magic?

its just a mystery to me. I had to ask so I could get some sleep

 

[Lutfij]

View: https://www.youtube.com/watch?v=ZQRwn-lecnk


So I know the pump runs at 100% speed at 40% Fan speed, but where is it getting power from?
I have to assume its the motherboard but not sure how its getting pump to work? How does the pump get the PWM signal? Magic?
The pump get's it's power from the PWM header/connector or so that's what it looks like after watching the video and reading through their installation manual.