From the Dashboard, Select "Club Management" followed by "Roster Builder"
Here you will select the "Event" that your teams are registered to and hit submit.
Once on the "Roster Building" page. You can use the hairpin to drag the player to the team that they will be rostered on. Or you can utilize the check marks next to the players name and click "Add to Team" for the particular team to bulk add player to the team roster.
You will now see that player on the team with a Yellow Triangle next to the name since the player was just added and has not been approved yet.
Note: All the players on the team currently have green checkmarks that signify approved by the event.
All New players will appear with Yellow Triangles until the roster is approved by the event.