Modify off.delay on NUT integration

Hi,
I have my ups connected to my ha host by usb and controlled by nut using the NUTDRV_QX driver
all is working but i cant find the ups.conf file in order to modify offdelay argument.
i tried to do it “on the fly” like the documentation said: ups.delay.shutdown with upsrw but upsrw is not recognized.
please help
thanks

Help please