From your picture I see you have a screw hole to the right of your needle. Check the attachments that came with your machine. You are looking for a screw and a rectangle looking piece of metal with a screw hole in it. If you have this than you can screw the attachment to your machine lining up with the measurements right under your needle. If no measurement are there you can adjust the attachment until it is a quarter inche from your sewing line and tighten the screw up at that point. I hope this makes sense to you. Hopefully you received an instruction book. Check there for more clear info.