Get a swivel. Attach a split ring and treble to one end. Slide the other end over your weighted hook is one way, but that's not line thru. For a line thru make a hole in the nose with a nail, stick a small piece of steel tubing in the nose, then slit the belly of the swimbait just behind the eyes of the bait. Thread your line thru and attach a treble with split ring to your line. Then bury part of the treble in the belly of the bait. Don't know what brand of swimbait he was throwing.
"Things turn out best for those who make the best of the way things turn out" - Zachary Troy Schrah - a young man with vision far beyond his years.