OK, I know it goes over the left shoulder through the shoulder strap.

Mine has stitching near the top of the plaid to keep the folds together (I assume). Now the questions:

1- how far down the front of the shoulder do I position the plaid? Is the stitching also a marker? For example, should the stitching on the plaid be positioned under the shoulder flap?

2- where do I put the brooch in relation to the plaid? Up near the shoulder strap or further down? Do I put it over the stitching?