Rear brake adjusting

Hello.
I have a 2018 Micra N-Connector 0.9.
How are the rear brakes adjusted. Looking at the brake drums there is a countersunk Torx screw, what is this for?
How is the hand brake adjusted, can't see any adjustments inside the car, do you have to remove the central console or adjust it under the car.
Thank you for any advice given.
 
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