openconnect-gui - how to add csd-wrapper argument?

I'm not 100% sure if this is the right place to ask, but the openconnect-gui project seems remarkably opaque in terms of requesting assistance.

I've gotten openconnect working from the command line, but would prefer to use openconnect-gui. The only issue is that I can find no place to instruct openconnect-gui to add the appropriate csd-wrapper argument to the openconnect command line.