Thank you jng98908 I got it working on my 5b with your guide. I installed the latest official build.
If you have to do it on windows, install DiskInternals linux reader and you will be able to see the contents of your memory card in explorer in windows 10
The "boot file" is as stated /boot/armbianEnv.txt
add the line, eject the drive, put it back in the orange pi and run nmtui-connect
you will see your nearby networks