Maguire became the world's most expensive defender when United paid a reported 80 million pounds for his services and the England international delivered a man-of-the-match performance on his debut at Old Trafford.
Jose Mourinho, who has been out of a job since being sacked by United in December last year, joins a panel that includes the likes of Gary Neville, Jamie Carragher, Graeme Souness and Jamie Redknapp, broadcaster Sky Sports said.
Jose Mourinho has been out of a job since he was sacked by United in December following a dismal run of results that left the club sixth in the Premier League standings, 19 points behind league leaders Liverpool.
Jose Mourinho, who was sacked by Manchester United after a 2.5 year spell, intends to return to the game before the start of next season but said he would only join a club that did not have "internal conflict".
Jose Mourinho was seen attending a match between Montpellier and Lille and was seated alongside the latter's sporting advisor Luis Campos, who served as chief scout when the Portuguese was manager at Real Madrid.