Understanding connectors such as SFF-8654 and SFF-8643 can be difficult, but this cables provide a critical pathway for rapid data movement . SFF-8654, commonly referred to a SAS connector, generally https://link-lungkay.com/product-center/cablecc-pci-e-ultraport-slimline-sas-slim-4-0-sff-8654-8i-74pin-to-dual-sff-8643-4i-mini-sas/