Dielectric grease does not conduct electricity. It's an electrical insulator not a conductor. It's only used for the rubber portions of the spark plug boots to keep moisture out and to keep the boot from sticking to the ceramic portion of the plug. Electrical conductors should not be coated with dielectric grease prior to being mated. A lot of people think it enhances electrical conductivity, a common misconception.
You should just ensure that the contacts are clean and you should be good. Maybe a slight film of some conductive grease if you want to feel better.

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