Where do I put driver with .dmg extension in the OC EFI??? Please help ASAP!

I have a USB wifi card with ralink chipset (RT5370 maybe). I have the Driver CD it came with and it had a macOS driver but the driver is in .dmg file. I checked here - https://github.com/acidanthera/OpenCorePkg/blob/master/Docs/Kexts.md , but here too RT5370 has .dmg file driver. WHERE DO I PUT THIS .DMG FILE in OC EFI?

Somebody please respond, I really need to know this! 😭