How do I thread the trimmer line onto the spool.echo srm-211?

The spool has two holes at top where the line comes out,below that is a circular piece about 2 to 3 inches in diameter.Below that is the body where the line is to be wrapped and at it's base it has 2 tiny holes opposite each other i guess the line runs thru there at some point.Then at the very bottom is another smaller circular piece with 2 slots opposite each other. In the center is a hole where the whole mechanism slides onto the shaft.Where do I start the line and how is it wrapped?