The Wally is your satellite TV connection so I am confused when you say you can't figure out how to connect Wally to TV when you also say connecting satellite to TV is no problem.
As an overview, you will want to have a coax cable running from your satellite antenna to the Wally and an HDMI cable running from the Wally to the 1 TV you want to watch. If you need to connect 2 TV's to satellite then you either need 2 Wally's or you will need an HDMI splitter and route a 2nd HDMI cable to the other TV.
Yes, accessing the back of the TV can be an issue but you would connect the HDMI cable there 1 time and leave it there once the TV is in place.