Need to adjust the parking brake on an 81SD...
or maybe it's something else, which brings me to this question;

I see there are two things...cable adjustment and some sort of brake adjustment through a keyhole on the brake hub. What determines which to adjust ?
My footpedal is going to the floor (there's still resistance) but not enough holding power - putting too much stress on the automatic transmission when parked on a slope.
Usually the pedal should hold the car firm only after about 3-4 clicks.

Thanks !