The MIMA system is designed to allow manual control of the assist and regen functions. If you need to disable this control, just flip the MIMA kill switch and the car reverts back to standard IMA and the MIMA card will not cause assist or regen no matter what the MIMA card tries to do. If someone that is not familiar with MIMA must drive, this is a simple way to disable the joysticks.
The switch can be mounted in one of the three knock outs above the small coin holder to the left of the steering wheel. Simply pop out the knockout by prying out with a knife. Drill a 1/4" hole in the center, mount the switch, run the wire, and plug into the kill switch connector on the MIMA card.