When you are in brave://components/ hit F12,
next press Ctrl + Shift + C and move the mouse over the ad block component - Check for update.
It should show "button#…s…t…r…i…n…g…button-check-update.
The characters making up the string correspond to the components folder in
C:\Users\USERNAME\AppData\Local\BraveSoftware\Brave-Browser\User Data.
Remembering USERNAME is the name you are logged into windows as.
If you navigate to the folder manually you need to make sure you tick view/hidden items in file explorer.