Schurr Corner Spinnaker Turtle

I have two small ripstop curtains made by Schurr for being a spinnaker turtle in the forward corner of the cockpit. These were in a sail bag with the 5372 I bought recently. Each one is shaped like a rectangle with each corner having a bungee cord, and then the top has a large flap piece with a screw snap. I think I saw a photo of one made by North without the flap. Does anyone have one and take a picture of how you installed it? Did you just drill holes for the bungee cord, etc. I guess I would just bundle the spinnaker and fit the piece around it to select holes placement? Thanks for the help, Jim