That's not a flight controller, it's a simple power distribution board, most likely [1]. Flying wings generally don't need flight controllers, they just need two servos and an electronic speed controller for the motor. A flight controller is nice because it can stabilize the plane, and it can also provide autonomous flying it it has a gps. If you just want to fly around like that, no need.

[1] https://images-na.ssl-images-amazon.com/images/I/61k-Sva2oYL...