I purchased a 3-pack TP-Link Deco X75 but am having problems installing it. In every room where I want to place a Deco I have a wired connection but only the 1st Deco I install connects via a network cable, Deco 2 & 3 only want to connect wirelessly to the 1st one I installed. The problem is that I also want wireless internet in my garage, which is wired and 10 meters behind my house, but when I connect the Deco there via a network cable, I can't get it installed. Wireless is also not possible because the distance between the Deco in the house and the garage is too far. I thought you could connect each Deco via a network cable to create the best possible wifi connection. What am I doing wrong as I am a novice in this and would like to get this resolved. Thanks.