Romio Basic w/Stream and MoCo router set up question.

Question for some of you guys who have more knowledge then me. I have a basic Roamio with a stream that are plugged into my router now, and it works great.

I just bought the ARRIS/Motorola SURFboard modem router that has to MoCa ability in it. If I turn on the MoCa, does the Roamio basic connect through the cable to the internet, so do I still leave it plugged into the router?

Thanks for the help.