Marou opened the score for the hosts in the 54th minute, before Sanou scored the second goal in the 72th minute.
In the other match of Group B, Zambian Napsa Stars and Algerian JS Kabylie were held to a draw (2-2).
Following these results, JS Kabylie leads the group with 4 points, ahead of Coton Sport (3 pts) and Renaissance Berkane (3 pts).