this is what I was thinking and makes perfect sense but I put a piece of electrical insulation between the points to be sure because I did not want to destroy the original limiter like RTE says to do .
The downside of not opening this gauge is not knowing the condition of the gauge part. Due to the age and the duty cycle of the fuel gauge over 50 years, Most of them are toasted.
I rode that wagon for about 8 years. Opened over 100 rally fuel gauges. Majority of them needed more than just limiter disable. So I totally removed the limiters, renewed the gauge part as needed and calibrated to a solid state regulator. I still have a few 15 dollar cores here that I have yet to open. I pretty much know what I would find inside. There's currently a parts wanted post for good known working rally fuel gauge. That is as rare as hens teeth. Good luck to all.
