In that case the answer is "you don't."
If the self-adjusters are installed correctly you can see them doing their thing as follows:
* Jack up right rear of car so wheel is off the ground
* Remove wheel
* Remove brake drum
* Check car is in neutral and start engine (to reduce brake pedal effort)
* Press brake pedal (only part way down so brake cylinder won't overextend) while standing outside the car so you can see the brake shoe(s) move.
Each time you press the brakes, a brake shoe will move outward enough that the self-adjuster can click over a tooth or two. Eventually the shoes will self-adjust out so far that you can't get the brake drum to fit over them any more.
So the adjusters can work, but in practice with the drum on they don't seem to. My theory is there's too much slack (in the springs holding the adjuster to the brake shoes) and not enough travel (in the brake shoes when they have the drum in the way).
I use the above technique (not necessarily with the engine running) to adjust the brake shoes whenever handbrake and foot brake travel become excessive - keep pumping the pedal and refitting/removing the drum until the drum only just fits over the shoes, then bolt it all up again and repeat the process next year.