Plymouth Argyle hosts Norwich for their first meeting since the 2008-09 campaign, with the Canaries winning both matches that season.
The winger seems pleased to have finally started working with his new teammates and told the club’s website about his delight.
“My first day’s been really good,” said Mustapha after their first session with his new teammates.
“The players, everyone around the club has welcomed me pretty well. It is been easy to join the guys.
“It’s been a bit stressful, but both parties knew we had to be a bit patient because of all the visa stuff.
“I know it’s a very good club, a very loving club. The people are close, and a massive fan base travels all around the country to support the team which has been through a lot over the last few years.
“I said yes to the offer, to the opportunity to take another step in my career.”
Norwich have only won five of their 32 league visits to Plymouth Argyle but did win their last game there in September 2008 under Glenn Roeder.
Plymouth Argyle have won 22 of their 26 home league matches since the start of last season (D1 L3), which is the most of any side within the top four tiers of English league football in that time.