What is the input type for side buttons on a mouse?

Hi I have a mouse with side buttons and I want to detect when someone presses side buttons on their mouse. what is the Enum.InputType. for a side button on a mice?

I might be wrong but I think there isn’t any because side buttons aren’t a universal things unlike MouseButton1Up or MouseButton2Up.

Usually those side buttons can be remapped to any key, so there wouldn’t really be a way to tell if it was pressed or not.