The United States international joined the Potters from FC Dallas on transfer deadline day and he featured against Scunthorpe United in a behind-closed-doors 3-1 win at the Britannia Stadium on Tuesday.
O'Connor was impressed by Shea's contribution and he says that the 22-year old is in Tony Pulis' thoughts ahead of Saturday's game at Fulham.
He said: "It was nice for Brek to play another game. He's getting to know his team-mates and developing that understanding the more they play together.
"He comes into our thinking for Fulham. He is in the mind of the manager.
Asked about where the American is likely to feature, O'Connor added: "Yes, his position is definitely on the left-side of midfield."
Marc Wilson continued his recovery from injury in Tuesday's game but striker Cameron Jerome had to be taken off in the first half with a knee injury.
O'Connor said: "It was just precautionary after he took a bit of a knock. He will be fine.
He was also quick to praise those who have not played as much first-team football, saying: "It's a squad game and the attitudes of all the players have been very good. They want to play every week, and are disappointed if they don't get a shirt, but their responses have been spot on.
"They are fighting to get back in the team and get the manager's attention in training. I know how they are feeling and it's good to see that spirit. They had a few days off and it was good to get a game."