In an increasingly popular setup, the standing end of the sheet is secured to a padeye on one end of the traveler track. The lead then runs through a single block on the closest traveler car, up through a single sheave attached to the sail clew, then back through another single block on a separate traveler car and, finally, through a block on the opposite end of the track before running aft. This provides a 2-to-1 purchase, works very smoothly, and reduces deck clutter. The only drawback is that it requires a little longer track to allow space for two traveler cars for any given sheeting angle. Another basic option, which I first saw on Wally's large boats, runs the sheet from the mast itself, usually well above the deck, down to one traveler block, up to the jib clew, down to the other traveler block, and back up the mast before turning back down to the deck via mast exits, much like an internal halyard. Similarly, one can run the sheet between blocks on the traveler and the clew before running the tail up to the mast.
Handling the Self-Tackers**
Unlike a "normal" jib, which employs sheets that lead to cars that you can adjust fore and aft on tracks to maintain good sail shape no matter the height of the tack or strength or angle of the wind, the traveler position for self-tackers is fixed fore and aft. To set up and control the shape of a self-tacking jib, the sail requires a clew board with multiple positions to which to attach the sheet or sheet block.