how can I find out information about which body part the observation belongs to?

similar to the OpenAI mujoco tasks where they have documentation detailing which dimension of the state corresponds to which part of the physical body, it would be good to be able to have something similar for DMC. If I look at e.g. walker-walk all I get from the time step is an observation with 'orientations', 'height' and 'velocity'. Can I at least find this information out by looking at the source code?