Those are PCI slots, not PCIe slots, and so the SSD adapter and the WiFi 6 card will not work on it

Note that the white and black PCIe slots operate at PCIe 2.0 x8/x4 respectively, if you have a discrete GPU installed on the first slot (i.e. the dark blue PCIe slot)

The white PCIe slot will run at PCIe 2.0 x8, which gives you a theoretical maximum of 4GB/s speeds (or equivalent PCIe 3.0 x4)
On the other hand, the black PCIe slot will run at PCIe 2.0 x4, which translates to a maximum of 2GB/s speeds

Do note that PCIe to NVMe adapters may not work properly due to the BIOS may not handle booting from PCIe storage correctly, and you may need to use certain tools like Clover UEFI to work:
https://www.win-raid.com/t2375f50-Guide-NVM...der-method.html

That being said, a WiFi 6 adapter should work fine as long as you have the correct drivers for it