One servo and 90degree bellcranks?

Servo drives a left pushrod and a right pushrod. Drive both from "one place" on the servo. So both pushrods move in the same left-right direction when the servo moves it's arm.

Now install all the 90degree bellcranks in the same direction when viewed from above. Say they look like L from above... servo drive the forward arm. arm pointing to the right drives a flap.