Suppressing C103

In Delphi 10.2, trying to suppress C103 with the //FI:C103 form given in the manual does not work. I applied the comment on the line in which the variables were declared. All boxes in the FixInsight settings are checked.
Using {$IFNDEF FIXINSIGHT} {$ENDIF} around the declaration did work. All of the variables were in a single row in code. Is the simple form not effective in declarations, but only in code?