Marketo integration with AEMaaCS

Mundane question.I should integrate a marketo instance with my AEMaaCS environment.
In all the online guides I read that I should only need to enable the connection from the marketo app in the Cloud Services section of the AEMaaCS instance, but my instance does not have such an app.
Do I need to request Adobe Support for activation or do I need other packages to be installed before integration with Adobe?
Do you have any guide on integrating from scratch?
Thank you