Umarex Airsaber Bowfishing rig

I've only bowfished with archery equipment that used a solid fiberglass arrow and a safety slide. With traditional archery equipment line tanglement will have the arrow coming back at you. With something more powerful like an Airsaber, line tanglement will likely have the bolt breaking free from the line and loss of the arrow (which is better than injury).

I'd like to know how the line is secured to an airsaber bolt.