Shimano Nexus 3 speed bell crank cable install: popsicle stick 3rd hand
Installing a new shift cable in the bell crank for a Shimano 3 speed hub, it takes three hands to hold the cable snug, tighten the clamp bolt onto the cable and also hold the bell crank push rod arm in position so the yellow mark is between the yellow set lines on the housing window. Tape three popsicle sticks together and slip the end of the stack into the bell crank housing to shim the arm into position. Add some folded paper in the stack to fine-tune the thickness. This will free you up to work on the clamp bolt with the wrench while pulling the cable snug.