This if a quote from a manufacturer of dielectric grease:
"While the indicated use of dielectric grease calls for it to be used only on the non-metal parts of a connection, it has been shown to be effective at preventing corrosion when applied directly to the metal connectors as well. Care should be taken when using it in this way, because this application can, in some instances, cause the connection to stop working. A common reason for such a failure is that the grease has not been pushed entirely out of the way between the two points of contact."
Dielectric grease is designed to be pushed out of the way with most connector contact pressure. This is one of the special qualities of dielectric grease that make it suitable for electrical connections. GM weatherpack connectors are one such exception as they are designed for robotic assembly and as such have extremely low contact pressures along with o-ring seals that are not compatible with dielectric grease.
The connectors on our Valkyries are fine candidates for dielectric grease and I have used it generously and successfully on all my bikes for decades without exception. It seals out moisture and oxygen the two culprits, along with current flow, that promote corrosion.
Yup, I use it all the time.