Adding a SATA HDD with no SATA ports nor PCIe slot?

The ” SATA drive is directly powered by the PCIe slot, but the data is not pass-through the PCIe slot A SATA cable is require to connected to the SATA port

Four-channel SATA III PCI-Express controller with two internal SATA ports and two slots for SATA disks Standard & Low profile

sata slot PCI x4 If that's correct, I presume I can't connect most SATA III controller cards into either of the standard PCI slots?

sata m2 slot Supports SATA Gbs, SATA 3 Gbs and SATA 6 Gbs Dimensions : ca 1 x 67 pin key B slot Interface: SATA PCIe (2 or 4