Predefined bindings are buried in the game files (specifically, in "%LocalAppData%\Frontier_Developments\Products\<name-of-the-game>\ControlSchemes"; note the underscore in Frontier_Developments).
That is not always correct. The preset control schemes directory lives under your installation path - in my case under Program Files (x96)\Frontier\EDLaunch\Products etc.
I know some people have had the game installed in the "users" tree and of course Steam users have it under their SteamLibrary tree and Epic in another place. So, just pointing out that your "specifically" is not the definitive situation, in fact Frontier calls that an "alternative installation":
Listed below are the default file for the varying Windows installations of Elite Dangerous and Elite Dangerous: Horizons.Tip: You can copy and paste these locations into the address bar of Windows ...