i couldnt see two adjuster screws under the flap...ill look again....!
On mine there is only one, I remove the centre console and disconnect the 2 plugs for the window control.
The hand brake adjustment requires adjustment at each wheel, as the Automatic adjusters do not always work that well.
I think there is a down load, but this is the general approach
1 Jack up rear and place on axle stands etc
2 Slacken the adjuster under the handbrake lever.
3 Remove rear wheels and only the brake drum on the side you are working on. You may need 2 x 8mm bolts to help remove the drum, and some release agent, but yours should be ok.
3 Adjust auto adjuster and try re-fitting the drum.
4 Apply foot brake several times and hand brake several times. (make sure both drums are on).
5 Repeat process 3 & 4 until the drum just goes on.
6 Repeat process on other side, refit wheels, check for binding,
7 Apply brakes several times again.
8 Go to adjuster under hand brake so that the handbrake starts to grip on say 2nd click etc
Other members may advise otherwise. But it works for me.