As of my last knowledge update in September 2021, I'm not aware of a specific "Yg" connection in the context of transformers. Transformers are a type of neural network architecture that has been widely used in natural language processing and other domains. They consist of an encoder and a decoder, often used for tasks like machine translation, text generation, and more.
If "Yg" connection has emerged as a term or concept after my last update, I would not have information about it. It's possible that it could refer to something specific in a particular field, industry, or development that has occurred since then. If you can provide more context or information about where you've encountered this term, I'd be happy to help you to the best of my abilities.