If it isn't going to get wet, you could always use a 2 screw connector.
https://www.homedepot.com/p/Halex-3...Cable-Clamp-Connectors-5-Pack-20511/100133208

thanks guys, I think the plastic one will have to do. It's for a mini split interconnect "cable" (don't want to say cord...) I want to seal it against water.