Step 4: Connect the plug.
Pull the shoe lace as close to the plug as possible and then slide the cover back up towards the plug.
Make sure none of the connections are touching. Pull the cover up right to the base of the plug where the shoelace meets the wire connections. Fill the cover with hot glue and screw it on as quickly as possible. You may need to use your pliers to make the last few turns.
Let it dry. It should now be permanently closed.