Why 10.7 volt input at ‘71 Duster instrument panel?

There is sheet like piece of rubber isolator between this instrument and the housing also but none of this would prevent an audible clicking. It only prevents a low humming coming from a machine-like instrument and resonating through the dash.
If anyone needs to replace the 2 round isolators at screws, They are a generic item. Just I.D. and O.D. and Google search will find a package of 10 or more for mere coins. They likely will be a translucent silicone material instead of black rubber.
I think DMT has all in one package that includes the isolater at trip clock reset stem.