You dont need root (It works only on your Huawei phone if you have this app as system app, you only need to update the app)
Make sure you unticked "encrypt my backup"!
The backup file is in /sdcard/HuaweiBackup/backupfiles/DATE YOU CREATED IT/wificonfig.db
Hope you enjoy!
I use Mobizen (no root required!) for recording (for android 4.2 and up: don't download from google play store, download it from Aptoide and give it ALL permissions).
If you use Mobizen you will have to install a 'boostermode' driver from your PC.