Cosse made his Stars debut as a 76th minute replacement for Goodman Dlamini in a 2-0 win over Baroka in Bethlehem on Saturday.
The 25-year-old was signed in January by compatriot Luc Eymael from Belgian third-tier outfit Patro Eisden, having also had stints at RFC Seraing and Tienene.
"It’s a very nice feeling to be playing in the PSL," Cosse told his club's website.
"I am working very hard at training to get a starting 11 berth.
"I was very satisfied with my 20 minutes I played for my first match, and it was [the] cherry on top that I ended up in the winning team. There is still room for improvement in my game."
He added: "If I take a look at the two leagues the Belgian and the PSL, I must admit that the PSL is much faster and has quality players compared to the Belgian league.
"I still need to adapt to the weather conditions but I should be okay in the coming weeks."
Ea Lla Koto, who are six points behind log leaders Mamelodi Sundowns with 10 matches left, next host NFD strugglers Super Eagles at Goble Park this Saturday (20h15).