I have a Lucas sport coil with a push-on style lead connector. Recently I purchased a set of Lucas ignition leads (very flexible graphite leads that are hollow in the center. The lead to be terminated to the coil came with a small brass disc or washer attached to the lead end with a small brass screw installed axially in the end of the lead. It will not fit into the coil connector. The disc diameter is larger than the diameter of the coil connector entry.
What am I doing wrong? Is the disc a temporary part that should be removed and replaced by something else? Sadly I do not have the original lead for comparison.