Star key direction

Being bored in the winter with plenty of time. I did a little detailing. When I started to put it back together I came across a problem in my head.
I noticed, when putting the rear brakes back on the rear, the books say theres a star key with a L on it that goes to one side and the unmarked one on the other side. Both my keys are unmarked but screw out (or in) in different directions.
Now which way is the way it should be?
Pic for kicks.