Documentation says that USEANSISQLQUOTES should do the trick.
Supporting case and special characters in column names
By default, Oracle GoldenGate treats any string within double quotes as a literal. To
support column names that are case-sensitive or contain special characters, you can use
the USEANSISQLQUOTES parameter. USEANSISQLQUOTES enables Oracle GoldenGate to follow
SQL-92 rules for using quotation marks to delimit identifiers and literal strings. With
USEANSISQLQUOTES enabled, Oracle GoldenGate treats a string within double quotes as a
column name, and it treats a string within single quotes as a literal. This support applies
globally to all processes in the Oracle GoldenGate instance. For more information about
usage and limitations, see USEANSISQLQUOTES in the Oracle GoldenGate Windows and UNIX
Try maybe putting parameter USEANSISQLQUOTES right before your mapping.