I would start Connolly over Wendell, regardless of if it is at center, left guard or right guard. Connolly is no all-pro but Wendell has had a few plays when he just flat out looked bad. It is imperative that the Pats don't let the Broncos get consistent interior pressure and I trust Connolly to make that happen much more than I do Wendell.
What depth chart are you referring to that has Wendell as the starter? Wherever it is, my guess is that it simply has not been updated for a few weeks.