The phrase "to support these roles" means to provide help or assistance in the tasks or responsibilities associated with those positions. Full definition
At the end of each of the game's chapters you're awarded new cards, including several star players who play supporting roles in the story. (caughtoffside.com)
Serve in administrative support roles for corporate clients in diverse industries, including IT, education, manufacturing, real estate and healthcare. (monster.com)
Though she never became a star, she did play supporting roles in a few high - dollar productions. (rottentomatoes.com)