After the wind generators are gone try sending your survivors over.
I have 3 survivors parked on one of them and 4 on the other but I don't have a mission option. The tooltip mentions a control panel but I never saw one unless the wind generator is standing in for them. I advanced a turn with survivors on one of them I think but it never said anything happened.
EDIT: Looks like I just needed to advance another turn as they are both destroyed now.