There are 2 10mm nuts on the bottom if you take the boot off.
The way I do it is, take the back wheels off, tighten the cables till you feel the sleightest resistance in the rotors, the loosen it off a couple turns tills theres no resistance.
Left nut is left side, right is right.
91 318is - M50NV (gone)
02 WRB Subaru WRX EJ207 forged, 320 AWHP stock turbo.
85 - 325