Sorry as I missed this.
That would involve separating the drive shaft from the from axle and a lot of engineering.
I am not even sure how I would go about that. Mayne a joint that only grabs when it spins in one direction? IDK.
This is why they engineered the car like they did and try to over...
I think it is the same as my Fireteam E-Brake.
If it is, it is not much of a rear brake. When you use it, it locks up all four wheels making it hard to slide the rear out. But it does stop the car fast as all of the wheels lock up.
It is interesting but was over sold if you ask me. Wish I could...