If you see device error, i suggest you not to flash. But you can test it out by removing device check in updater-script if you are confident.
NO ZIP HAS FIRMWARE/BOOT/DTBO IN IT

Flash zips by name, zip1+zip2 and then either 3en or 3de
3en = encrypted
3de = decrypted

if you want to keep your storage encrypted, flash 3en.
If you want to make your storage decrypted, flash 3de and format data/internal (you will lose all files)
I suggest you to keep it flash 3en only, 3de may introduce weird bugs