225 Slant no spark

Upon closer inspection, and a smoking wire near the ballast resistor that I just replaced, it would seem that there are several suspect wires (homemade splices here and there) as well as melty bulkhead sockets. So the problem is not quite as simple as it may have seemed initially. I do have a multimeter but now not so sure I don't need to replace some sections after more due diligence. Any recommendations for replacement bulkhead connectors?