Research where is the best location for Content bank link in Classic theme

Content bank is accessible at system, course category and course level depending of the capabilities.

The content bank link is in the drawer for Boost theme, and under 'Site pages' in Classic theme. 

Would be good to research about what's the best location for this link at system, course category and course level.

Behavior for both Calendar and Content bank links are similar, so might be good to take into consideration both features at the same time.