How can I parameterize the generation of database startup scripts with YAB so that it defaults to the "proshut -byF" command instead of the "-by" switch as it is currently generated?

The current state is as follows:
"params = [r"/mfg/oe117/bin/proshut", r"-by", r"-shutdownTimeout", r"immed", r"/mfg/qad2018ee/dev/databases/mfgdb"]."

What I would like is:
"params = [r"/mfg/oe117/bin/proshut", r"-byF", r"/mfg/qad2018ee/dev/databases/mfgdb"]."

My YAB version is: 1.6.4.1

By the way: Is there a more detailed guide available that provides further insight into parameterization options with YAB?

Thanks for help!