Purchased the 3 pack of Deco M4's.  I have multiple hardwired ethernet connections throughout my home and want to use them to distribute wifi, being able to roam without any disconnects, or having to manually switch networks.  I presume I want to connect the M4's to the ethernet, but I'm not sure how they should be set up...

Do I create a new and separate network for each of M4's with the same SSID and password, or do I create a new network for one of the M4's, and then from within that network add the other 2 M4's with all of them having the same SSID and password?

I don't (think) I want/need the M4's to connect wirelessly to each other - I want them to use the bandwidth of the hardwired connection to distribute the wifi signal.  Also no need to connect any of the M4's directly to my router, right?

Any insight is greatly appreciated!