I've been wondering about the purpose and the intended location of an strange black lightbulb fixture beneath gauge cluster in the console of my '68. It shares wiring from the console harness and appears to serve as the circuitry for the low fuel light in the dash (both light simultaneously). The light bulb in this fixture seems redundant. What's also odd is that it seems GM designed the black plastic case to snap somewhere into the console gauge assembly, but I don't see where. The factory assembly manual has been no help. Any ideas where this thing goes? I just hate to leave it hanging there.