When you have uploaded all files you press the Submit button to submit you laboration for grading.
In some courses you have the option to choose the grader for your submission.
Read through the information carefully and check that the list of group members is correct.
When the lab has been submitted you see who is going to grade it.
From the user page you can always see the current status of your submission. The background color has now been changed back to grey to show you that your submission is being graded.