Quote:
Originally Posted by EddieN
Ya just need to add the aforementioned groundwire from the jack & you're good. Dunno why it's not shown. 
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I think you don't need it because the metal shield or metal control plate is the shared ground for the input jack inner ring and pots.
Since all mount thru the metal plate they all are sharing the ground and that's why there's no ground wire to the jack on the Fender diagram.