How do I make it so the main part in a hinge constraint doesn't rotate with the wheels?

https://gyazo.com/9a88f655c9b47d0d21ed7ff53b91332a

So, how can I make that middle part not rotate with the wheels and stay stable, while the car moves. (Theres bodyvelocity objects in each wheel that make it move forward)

I want to keep the whole model unanchored so it can move, but I dont want to invisible part to rotate with them other wise the whole model will rotate with them.