[Al Skierkiewicz]

Alan,
Many of the terminals look like the one I included except for one difference. The part that normally would be a wire clamp is actually welded or mechanically held in place such that the screw becomes the only wire retention device. Those terminals where the retention device moves and the wire has no contact with the screw work OK, if one removes enough insulation to allow at least 1/8" to 1/4" or bare wire to extend beyond the retention clamp. When the clamp screw is tightened, it should produce a compression on the captive wire and the remaining wire will actually expand a little. This expansion will keep the wire from pulling out during vibration. If no wire is exposed, the vibration will actually push the wire out of the terminal (like squeezing the end of a banana).