I can't find a schem that shows the 5e3 has screen resistors. All the schems I've found show none.
What "schematic from Fender" are you looking at? Is it for a Deluxe Reverb, or possibly the reissue Deluxe?
An actual vintage 5e3 has no screen grid resistors and all of the cloners build the 5e3 with no screen grid resistors so that's how I would roll if it were me.