Removing the PCI Expansion slot covers

You know the PCI covers that cover the PCI slots I removed more than was ultimately necessary, is it possible to put the removed slots back in

cover a list of ways to get the most use out of extra PCIe slots The most common PCIe slot currently in use are PCIe x16 slots

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pcie2 slot Search for pci slot cover Get fast shipping and top-rated customer service PCIe Slots into 2x 40mm Fans Improve GPU Airflow