Cueto's club Sale Sharks face French side Pau at Oxford's Kassam Stadium in the showpiece match of Europe's second-tier competition.
And the England winger insists he is fully focused on bringing some silverware back to Edgeley Park to round off a superb season for the Sharks.
Despite having had perhaps the most hectic day of his life because of receiving his Lions call-up after Iain Balshaw's injury, the 25-year-old insists he is looking forward to Saturday's game.
"It's been a mad 24 hours and the phone just hasn't stopped ringing," Cueto said.
"Tuesday was an unbelievable day and it was just fantastic to meet all the players, coaches and backroom staff.
"But I said over the last few weeks that if you keep playing well for your club week-in and week-out then chances tend to come your way, and I've kept on top of it with Sale over the lasts few weeks and months.
"Saturday is a chance to show again why I have been selected for England and now for the Lions, and I am really looking forward to it," he added.
The Sharks winger, who did not take up the game seriously until he was in his first year at university, could be forgiven for taking his eye off this weekend's game, and to start dreaming of the land of the long white cloud.
It is not Cueto's style, but he does admit to being slightly dazed by his selection for the Lions.
"It's only just beginning to sink in, the enormity of the situation," he said.
"It's been a fantastic season, and it is just brilliant the way things have worked out for me."