Callum O’Hare twice ended up on the losing side against his new club last season.But in those two defeats for Sheffield United, the 28-year-old caught the eye sufficiently to ensure Phil Parkinson made a concerted push to bring him to Wrexham for £7million ($9.5m) before the window closed on Tuesday.O’Hare scored United’s third goal in their 5-3 Boxing Day loss, displaying great awareness to steal a march on Matty James when arriving late in the six-yard box, and bravery to beat goalkeeper Arthur Okonkwo to a flicked-on cross. In the Bramall Lane return, he also created three gilt-edged chances for Patrick Bamford and Gustavo Hamer that should have put the home side out of reach long before Wrexham’s stirring second-half fightback.“Callum is a player I’ve known for years,” said Parkinson in the wake of Wrexham’s 3-0 triumph over Millwall on Wednesday evening. “There’s a really good energy about him, and he’s a really good footballer.“We need that. I was never going to use Callum at Millwall unless we really needed a goal. He had a long day on Tuesday, up at 5am (for his medical in north Wales) and then drove down to London. We need to make sure he is right for the weekend.”O’Hare signed for Wrexham on Tuesday for £7million from Sheffield United (Kate McShane/Getty Images)Whether supporters get to see O’Hare at leaders Swansea City on Saturday remains to be seen. But there’s no doubt that the Aston Villa academy product is seen as the answer to a riddle that was never quite solved last season: how to get the best out of a setup featuring two attacking midfielders behind a lone striker?All manner of combinations were tried, with Josh Windass and Nathan Broadhead often paired behind Kieffer Moore or Sam Smith, while other times Parkinson would opt for Ollie Rathbone and Lewis O’Brien in the attacking midfield roles.There were times when Wrexham could be irresistible, such as the second half of that 5-3 win over Sheffield United or the late, late smash-and-grab victory at Queens Park Rangers.Windass could also be pleased with his efforts over his first campaign in Wales, providing five assists in the Championship to go with his 16 goals as top scorer.But things did not click regularly enough as a team, hence the summer-long search for a new No 10-type playmaker who could provide the necessary creativity and consistency to supplement Windass’ qualities.Carl Asaba, the former Sheffield United striker who watched O’Hare two seasons at Bramall Lane in his role as an expert summariser for BBC Radio Sheffield, believes Parkinson has made a very astute signing.