Hi i have 4x MSI Armor RX 580 8GB and i have this risers

 https://www.amazon.com/Lesofod-Extender-Graphics-Extension-Powered/dp/B076MP4M8W/ref=sr_1_1_sspa?ie=UTF8&qid=1521081066&sr=8-1-spons&keywords=risers&psc=1

 my PSU is

 https://www.evga.com/products/product.aspx?pn=220-P2-0850-X1


So iam looking for the best way to power that risers