I would get some tabs from Radio Shack or somewhere then. I use them for most of my flexwatt, and they work great. They crimp to the cord, then the copper tab slips right between the plastic and the metal strip in the flexwatt. Add a piece of electrical tape and you're good. If you can't use those staples that hold wire in place, maybe add a little hot glue to secure the cord to the shelf or bin that the flexwatt is connected to, to prevent the cord from getting pulled out from the heat tape.