Are the m.2 ports on the CCR 1072 NVME ports or SATA ports?
block diagram talks about pci exp interface
https://i.mt.lv/cdn/product_files/CCR1072-150831130622_150822.png
interestingly
CCR2116-12G-4S+ shows pci express
https://i.mt.lv/cdn/product_files/CCR2116-12G-4S_211233.png
CCR2216-1G-12XS-2XQ shows both slots are sata 3.0
https://i.mt.lv/cdn/product_files/CCR2216-1G-12XS-2XQ_220346.png