Saints winger says that his side is focused on ensuring progression to the next round ahead of tonight's Europa League clash with Icelandic outfit IBV
Speaking to the Irish Independent, O'Connor revealed that the Inchicore side had met their objectives in the first leg.
"Last week, the main aims were not to concede an away goal and to win the game and we achieved both," he said. "Now, it's all about stepping up our performance and killing them off."
He continued: "We know that we can play a lot better than we did last week, but any win in Europe is a good win. It's funny, though, because a few of our supporters were not happy that we didn't win by more."
Citing Shamrock Rovers' relative European success last season, O'Connor admitted that expectancy levels had risen, but stressed that the team had to remain focused.
"Obviously, Shamrock Rovers raised the bar by reaching the Europa League group stages last year," he said. "But we can't be thinking that far ahead. We just want to get through to the next round."
The 28-year-old also believes that the Saints' fluid attacking style gives them an advantage in Europe, because it is 'more suited' to the competition.
"I think our play is more suited to the European brand, where teams like to pass the ball and make the most of possession," he said.
"It makes a big difference in European games if you can keep the ball, instead of chasing it all of the time. We are confident that we can do that and I don't think teams will expect it from us," concluded O'Connor.
St Patrick's Athletic take a one-goal advantage into the second leg of their Europa League first round qualifier against IBV in Iceland. The game kicks off at 20:30 BST.