Brake cable adjustment

I have a Sentra 91, I had problems with the brake system, I fix it, but when I put the handbrake (parking) in a slope the car tends to move since I put everything that gives the handbrake (parking) and does not stay still ..
They are the rear brakes, they are drum
changing the drum discs and a cylinder of one of the wheels and the tiles (shoes) of the two wheels. The parking brake as I assumed, but I don't know how to adjust it, what I did was the following, since I place the shoes and the cylinder instead, I put the new drum discs and start adjusting on the plate of the plate on a
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Have you graduated the tensioning screw of the handbrake lever?

Tensing the Opel handbrake in the cars that carry a mixed system (drum for the handbrake and disc for the service brake) is very simple:

you just have to remove the plastic housing that is located under the handbrake lever and there you will find a nut with a threaded spindle.

You lift the back car so that the two rear wheels are left in the air, then with the loose handbrake, you screw the nut until the two wheels are left on and loosen the nut until the nut is turned again.

Hand brake strips to the fourth tooth and at that point the wheels must go hard, but they can still be turned by hand, the two wheels must be just as hard.

You lower the car and with the handbrake lying about 3 teeth drive for about 300 meters approx so that the shoes fit in place.

If all this is well done, the car has to stop perfectively with the parking brake, if you have properly done everything described and still does not stop well, the rear wheels will have to be disassembled to check the correct assembly of the brake shoes.

All the best.