On this mission there is no entrance for the Rebel players. Instead in the Mission Briefing it tells you:
QuoteDeploy the heroes to the blue points, divided between the two as evenly as possible.
Considering the deployment points are hidden information, they are deployed by a rule and not in the Rebel deploy phase of mission setup, and every other time a rule states "Deploy the . . ." they are talking to the Imperial player, my interpretation is that the heroes in this mission are placed by the Imperial player, but I'm wondering if there is any clarification on that.