Replacing all running rigging and this is the last one. Tried to fish new outhaul aft to forward and something hard kept hitting. Reversed my approach and fished a messenger forwarf to aft. Lo and behold a block with becket appeared. Fixed end is somewhere in the boom but I can't see where. The only place that makes sense to me is that it fixed to a padeye or something that is part of the boom vang pivot boss. that is the only thing not riveted and is held on by massive Phillips head screws. Did I win? Is the outhaul rigged here?