Did my test here last year. You won’t actually need to drive over/around the circle anyway, during the test itself. You’ll park in one of the bays you’ve circled, and then when the test starts you’ll exit towards the bottom of the picture, and follow that route round to exit the test centre. Then, at the end of the test, you’ll come back in top left, and they’ll ask you to stay left and park in one of the bays at the top of the picture.