Yeah the ISP modems (OR and SHUB) will connect to the lines then the TP-Link will deal with the auth (like if you were using your own router with a FTTC service anyway) however I don't think you'll need to configure that in the tp-link for the VM connection as the SHUB will do all that, you can just connect it to the WAN port on the tp-link and it should just route the traffic through that way.
I've never actually done this however so maybe Igni can confirm what I'm saying is correct!