You don’t need an ini file. Even if you had one, it would be undefined as you would still have to make those input actions yourself. The input of the vehicles is controlled by input actions in the standard input component.
What you need to do is download the example project from the product page on the marketplace. Copy the plugin files from the engine->plugins->marketplace folder and make a folder in the example project with the same directory.
Click on the project file and build for 5.2 or your current UE.
Wheel physics are handled in the FGear axle component. Wheels bones should not have physics bodies in the physics asset.