a picture is worth . . .
The switch isn't symmetrical.
If you look at the front, then look at it from the back...
... the power connector is on one side or the other.
(assuming you keep the four inputs aimed the same way) -
People laugh at me for asking for so many pictures, but there's a gem in every one! - :up
I'll never forget the pix one of our Canadian brothers took a few years ago.
He was at a site with a BUD and lots of other dishes, and photographed 'em all.
There was plenty of info in the pictures.
The members here rattled off the names of every one, and told him which ones to get and which to leave behind! -