I am planning to get the Gateway router that goes with the Winegard 360 antenna in my 2020 Reflexion 303rls. I checked to make sure the 360 was on top and it is. I then went inside with a flashlight to find the covered port on the inside to connect the router but I could not find it. The slides were in so I may have missed it. On a video by Grand Design the port is in the hallway to the bedroom, but again I could not find it. Is this inside prewiring only on the 2021's or do i install the router on the roof inside the antenna housing??? Anyone with this system?? if so how did it work. Much thanks.