I'm having a sneak preview of how to fit cruis control & I need to remove the plugs so I can add some extra wires. The problem is I can't remove these nuts, so I can remove the steel retaining cover which keeps the plug from coming loose. The nuts seem captive on the top & I can't get access to the screw head from underneath. It may even be that the underside nuts are spot welded to the steel frame. Can anyone help ???