It is late at night, so I will concede that my brain might be completely out of gear, but if you have the outer-cable adjusted as in picture '2', have you not lengthened the outer cable which will effectively shorten the inner cable. Have you tried adjusting the outer sheath the other way, so shortening the outer-sheath between the 2 fixed points---the handbrake cable roller and the adjustment tang on the rear wish-bone.