Dear Sabashio,
You can connect the pump and the PSU with our pump switch 24-pin bypass connector. (BPTA-PSC-SOC)
Here is the link and video.
If you have any questions, feel free to contact us.
https://www.newegg.com/p/37B-000X-004Z3?item=9SIAEMWFTF8792
https://www.youtube.com/watch?v=f53IFvIKL2w