By Tim Healey/DFP StaffAs Joe Pereira sat in the Agganis Arena stands about two hours before puck drop, readying for the Boston University men’s hockey team’s nonconference matchup with the University of Connecticut, his attire said it all.A dark blue tie with lighter blue and silver stripes complemented Pereira’s white collared shirt, which featured blue pinstripes. His jacket lapel donned a pin of UConn’s new Husky logo.This was not just “Joe Pereira, former Terrier.” It was “Joe Pereira, UConn assistant coach.”Sunday evening, a 4-1 BU (5-6-0, 2-3-0 Hockey East) win over UConn (3-4-1), was the 26-year-old Pereira’s first time at Agganis since relocating to Storrs, Conn., to take the position with the Huskies.“It’s pretty exciting,” said Pereira, who finished with 61 points (27 goals, 34 assists) as a Terrier and was a part of the 2009 national championship team before taking over as captain in 2010-11, said. “It’s different, but it’s awesome, too.