With the heavy lifting portion of his offseason workload concluded, Blackhawks general manager Stan Bowman will spend the next couple of weeks taking care of some loose ends. One of those is a contract extension for coach Joel Quenneville. “We’re going to work on that,” Bowman said Friday as the Hawks’ annual prospect camp wrapped up at Johnny’s IceHouse West. “It just has been breakneck speed finishing up (the season), the draft, free agency and then this camp.” Bowman said he wants to extend Quenneville’s deal, which runs through the 2013-14 season, before training camp begins in September. “It’s always good to get those things done in the summertime and sort of clear the deck to focus on hockey in the fall,” Bowman said. Quenneville, who has guided the Hawks to two Stanley Cup championships — including this season when he was a nominee for the Jack Adams Trophy as the top coach in the NHL — in five campaigns at the helm, said he “absolutely” would like the matter resolved before next season begins.