The 32-year-old former England hitman agreed a move to the Welsh club last week after turning down the chance to resume his career in Australia.
Ridsdale told BBC Radio Five Live´s Sportsweek programme: "We have got a new stadium starting and I think Robbie was attracted to the opportunity hopefully to win a medal going back up into the Premier League rather than perhaps swap Liverpool for a team who might struggle up there in the Premier League."
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