They are, of course, single leading shoe rear brakes, therefore the result is self explanatory! and " as it says on the tin", it matter not at all which way round the shoe/backplate relationship is, Morrag
Same shoe will always lead ,yup agree with that . But in normal position ,viewing drivers side from curb, then leading shoe is to the right and wheel is rotating clockwise. So as brake actuates show is pushed towards drum by direction of wheel rotation.
Swap the drums side to side and again view the driver side . Now leading shoe is at rear but wheel is still rotating clockwise. Brake actuation now pushes shoe back to starting position.
EDIT
http://en.wikipedia.org/wiki/Single-leading-shoe_drum_brakeEDIT
http://en.wikipedia.org/wiki/Twin-leading-shoe_drum_brakeYup, understand the SLS set up now , was missing the fact that trailing becomes leading when reversing :oops: