How do you change the string on a Briggs and stratton weed boss?

my weed boss has a great feature in putting line onto the head.Basically you just cut 2 pieces of line about 20cm long and push them through the holes on the outer edge of the head, don't forget to push enough through so you can grab it from the inter hub once the line is worn out. This one way action is super fast and easy to do. You will get the hang of it in no time.