Ray Allen’s role in Miami is yet to be totally determined. And that clearly doesn’t bother the NBA’s leading 3-point shooter. Allen and Rashard Lewis signed their free agent contracts with the Heat yesterday, giving the NBA champions a pair of veterans who bring tons of experience and versatility to a lineup already featuring LeBron James, Dwyane Wade and Chris Bosh. And both wasted no time saying they want to adapt to the Heat way. “Whatever’s going to be best for me in this situation is going to figure itself out,” Allen said, flanked by Heat president Pat Riley and coach Erik Spoelstra for his introductory news conference.