If they haven't been installed, it will be very easy to find:

On the front, turn the wheel all the way to one side. Inside the wheel well, in front of the pivot point, you will see the hole. Do the same for the other side.

On the rear, you will need to lay on your back, right in front of the wheel (about 6cm) on the inboard side of the wheel, you will see the hole. I will try to get pictures for you.