No it was a turned piece of acrylic with the plug glue in. when they remove it from the shoe it does not have the plug . But when you see him pull it from the claw he is holding the plug to pull it out and then hands it to the other Klingon and he plugs it into the barrel .
The fishing line/ monofilament is like a 100pound test line we purchased it from Big 5.
See now you got me thinking about it so more info is flowing.
The fishing line for the cable was multiple strand’s of the fishing line bundled together with Zipties.