By default
/EFI/BOOT/bootx64.efi as the extension that will load and execute in order to load the operative system.
In Windows machines, the correct extension is in /EFI/Microsoft/Boot/BCD.efi
for openSUSE is /EFI/opensuse/grubx64.efi (or shim.efi if we have secure boot enabled)
OpenSUSE EFI file for secure boot or not
opensuse File(\EFI\opensuse\grubx64.efi)
opensuse-secureboot File(\EFI\opensuse\shim.efi)