Yes, I think so. To start, better use a common Windows PC with VirtualBox, install Debian from netinst.iso there and put the wifimgr.sh script including the sample there... it will generate you a /etc/config/wireless file you can then compare to your "wished" config on your prod router and adjust the template until the script generates what you need. So far, you can then use openwrt's ssh howto to let your mgmt VM send the config to your device.
ref # A "KISS" wifi manager script to push /etc/config/wireless using a central mgmt server