Current research aims at developing the Internet of Nano Things and ultimately the Internet of Bio-Nano Things. An important subset of the Internet of Bio-Nano Things is the research on molecular communications and networking. Molecular communications employ data transmission based on molecules or nano particles. Potential applications are closely related to personal healthcare (e.g., eHealth, medicine, human body monitoring), which is also an important vertical in the context of 6G. The primary focus of this paper is to provide a detailed architectural link between 6G systems and molecular communications. The article explores how existing molecular communication systems can be integrated into future 6G soft-warized architectures. This work provides architectural design guidelines and a discussion on the key performance indicators, relying on the latest results both on molecular communications and 6G.