Insert bare stranded wire, tighten screw.
I really dislike these types of connections. In my experience the set screw needs to be retightened often, the copper gets all oxidized, the screws can loosen up and the wires fall out. Yesterda...
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Not sure I would use loktite on electrical type screws but I do tin stranded wire. Seems to do a better job of holding wire in place.
