A club statement reads “We have huge respect for Connell’s qualities, both as a player and person, and we’re delighted he’s staying with us.
"We've seen him evolve over the years and adapt brilliantly to new roles and responsibilities.
“He was a key player for us in what proved to be one of the best seasons in our recent history and has experience of League Two from his time at Port Vale, so we have every confidence he can continue to make a very positive contribution with his performances.
“Away from the field, we believe Connell’s excellent relationship with our supporters and deeply engrained understanding of the club and its culture are extremely valuable.
“Everyone could see how much our victory at Wembley meant to him and we really appreciate his passion, loyalty and commitment.”