Question: How do you fuse bungee cords together?
Options:
Burn the ends of the pieces you want to connect, which melts the plastic and hold them together at that point.  Lightly heat them to finish the fusing process.
Tie the two ends of the pieces you want to connect, wrap them together with electricians tape and pull to test strength, add more tape as needed.
Answer: Burn the ends of the pieces you want to connect, which melts the plastic and hold them together at that point.  Lightly heat them to finish the fusing process.