Dead easy with Spax. Well mine have been the same.
(Two sets on diff cars)
Top adjust. (fronts)
Ya should have a knurled knob, plastic about 50mm dia.
This fits on the mop of the shock and gives direction of travel, its usually clockwise for hard, anti-clock for soft.
So best to go one way or the other til it wont go any further, so its either fully hard or fully soft. Then decide where ya want it. If its in the middle when ya start, best to count the clicks as ya go then u will know where it was.
Rears i'm not sure if you will have top or side adjusters. tops as before, if its side then the principle is the same, ya kust have to use a srewdriver or allen key.