The next step is to punch the holes for you poppers and attach them in place. All the pieces you need can be bought as a kit for a couple of pounds.

I worked out the placing of these by cutting the top holes first ( these needed to be well placed as they are the most visible) then drawing a circle through these holes on to the underlying leather so that they line up perfectly. These poppers can be wherever you want. You could probably even get away without them or use a different type of fixing.