My house is "wired" for LAN connections in every room. Unfortunately the "hub" for this is hidden in a metal box in a closet in the master bedroom - not a place you want to put your main router. So I have a wifi router in there (with Wifi turned off) and then place the Main Deco in the living room, connected via the LAN to the "closet router."  I then just have the two Deco satellites placed throughout the house, currently connecting to the Main Deco wirelessly.

But one of those satellites (in a bedroom) is right next to another LAN connection back to the "closet router" - Can I just connect that directly to the "closet router" via ethernet for it to get it's internet connection but leave it part of the same MESH WiFi?  Would I need to change the operation mode to "Access Point"?  If I switch to "Access Point" how does that effect the Mesh Wifi system from the Decos?  I don't use the "closet router" for anything other than to get the internet signal to the house LANs for the Main Deco and also to connect my computer directly to the internet in my office.

I want the Deco System to be my WiFi System - I'm not really wanting to use it as an "access point" for the "closet router."  I just figured since one of the satellites is right by the LAN Connection, it'd be nice to have it hardlined versus a wireless connection to the internet if possible.