"They do a lot or work looking at teams' strengths and weakness and the video work on what we can expect," O'Connor told the Sheffield Star.
"It's certainly paid off - that's the third or fourth goal we've scored that's come from information they've given us. They put in a lot of hard work and maybe not a lot of people realise that.
"Sometimes it's the little things that win you games - attention to detail is something they're very sharp on."
Sheffield Wednesday have a free weekend before facing Doncaster next Tuesday and O'Connor added: "There are a number of games at the weekend and a bit of luck from those would help us. We need to keep winning and get up the table. It's so tight."