The 22-year-old leaves the Yeltz after a superb season in which he plundered 31 goals in 46 matches as the club challenged for promotion from Southern League Central Division One and reached the semi-finals of the FA Trophy.
But with the league campaign having been halted by the coronavirus and results expunged, the former Notts County player made clear his desire to try and re-enter the professional game.
"Montel has a desire to get back into the pro game,” explained Smith.
“I’m delighted we have been able to help him focus on his football, and give him a fantastic platform that he can now move up from.
“He leaves behind a fantastic group of players that I am actively looking to strengthen in the coming weeks.’’
Despite there being no indication yet as to when precisely next season will begin, Smith has still been busy assembling a squad ready for whenever non-league football can resume.
Skipper Paul McCone is among those to have agreed terms on a new deal, while Rob Evans, Simeon Colbourne, Reece Hewitt and Robbie Bunn will also return.
The Yeltz sat second in the table when the season was stopped in March.