I'm trying to replace the light above my kitchen table. The junction box seems to have a solid electrical wire. It was connected to the light's stranded wire with this connector here and also wrapped in what looked like sticky black rubber. I peeled off as much of the rubber as possible and then I cut the stranded electrical wire to remove the old light. I tried to pry the connector open by the stranded wires and it looks like it could be gold inside? How do I remove the solid junction box electrical wire from this connector now?
I need to connect the solid wire to my new light fixture which also has a stranded electrical wire. My new light fixture includes the simple plastic wire twist connectors which I know how to use. 
Best Answer
These don't get "removed", they get cut off. Snip the copper solid wire at the end of those connectors, strip off the insulation and then use wire nuts or some other approved connector to connect the wires for your new light.