Connector
Attach a connecting terminal
Trial fit the dangler assembly to the tank and barrel.
Move the dangler hose in/out until the tip of the dangler bolt sits "about right" in the barrel. For reference, mark the hose where it enters the guide.
If it's too long, cut the other end of the hose/braid off, leaving enough spare to adjust the hose in/out as may be needed.
Solder/crimp/whatever your favorite electrical connector to the braid, and seal it all up. Heatshrink works good here.