Question about the Onda B250 D8P motherboard.

I got the version that has the PCI power connectors.  There are 8 slots but only 6 PCIe power connectors labeled "PWR_PE1", "PWR_PE2", "PWR_PE3", "PWR_PE4", "PWR_PE5", "PWR_PE6".  My guess is that they provide power to "PCIEX3, "PCIEX4", "PCIEX5", "PCIEX6", "PCIEX7 and "PCIEX8"?  Also guess that slots "PCIEX_16X" and "PCIEX2" get their power from the ATX connector?

Finally, is the 8 pin connector "PWR12" for the CPU?