How can you disable torque to some wheels on a Chaos Modular Vehicle.

All of the wheels seem to get power, with no way to turn certain wheels off. How can you make just a rear wheel drive vehicle?

It seems to imply you can in the docs:

It says: “Longitudinal and lateral grip forces can be driven or non-driven.”

But where is the option? Am I missing it somewhere?

What if I want to lock the differential? What if I want each wheel powered by its own moter like on an EV?

For being a modular system, this whole setup seems very limited and disappointing.