Tom Mannion’s scene comes after Lando says “I wonder what those star destroyers are waiting for”. He is the Imperial officer wearing an olive uniform looking out the window. This is the scene where Mannion said in an interview that he saw the back of his head. https://www.dailyrecord.co.uk/entertainment/celebrity-interviews/new-emmerdale-star-tom-mannion-1465893.amp

Here is a picture of that scene.
https://i757.photobucket.com/albums/xx214/Mytran77/SSD bridge ROJ enlarged detail_zpss333krsq.jpg~original