Thanks, chaley, for the clarifications.
Nothing I've written should be taken as criticism. I hope I've been clear that I have great admiration for people's achievements with Calibre and Calibre Companion, especially in the areas of functionality and user experience. I was mostly concerned to address points like "no, of course you can't do that" or "why (on earth) would you want to do that?".
My interpretation of the OP's question, as "What is the command line calibre command to start up the wireless device connection?" has been answered and explained, as "There isn't one, at least not yet", along with some useful suggestions and comments.
Thanks again. (Response to ellet to follow.)