Z2 Mini G9 PCIe slot is out of spec with PCI-SIG

Fractal Design Flex 2 PCIe Vertical GPU Bracket Kit pcie slot bracket The bracket starts from from the top the pci-e opening and from the from the secondary side of the pci-e pcie slot height bracket for PC, also called slot bracket or card holders Those are equipped with cut-outs which offer a secure mechanical connection of the IO connectors

pcie 4 in pcie 3 slot ssd They are called brackets when attached to an expansion card When used by themselves to simply cover an expansion slot in a computer's case,