@sdetweil I don’t have any modules with uper case letters (MMM- …) at the moment. Can you confirm the module class name is with uper case letters or is it changed to lower case?
In this situation, with a unique module name, it’s ok to identfy the module without the .module
but in general I’d say it’s best practice that if you want to address a specific module, you describe it as precise as possible.
E.g. there might be a module “image_frame” that you want to address but there’s also a module that somewhere within its structure has one div with the class “image_frame” that you don’t want to address. Then it’s absolutely necessary to address the target with .module.image_frame