Ok, I know what I have done now.
That is the correct button code
What this does is creates a command pluginname_settings
now my plugins will intercept the command and load the settings screen and do any necessary processing required.
for wifiman I put a translation in exectbl.ini
So, if the plugin has a <pluginname>_settings command, then that will be handled by the plugin, if not then a translation in exectbli.ini is required.