I've seen exemples of these tying to on the side of the leg to the braies and others, as the exemple above, that ties on the front of the leg to the braies. I also believe that it's possible to have the seam at the back of the leg or on the inside. So I've made some layouts that shows little variations in "How to cut-out your pattern" in order to create the desired style. Note that it's better to cut the leg-piece on the bias as it was done in period for a better stretchability. I would also suggest that you cut-out the piece a little bigger and that you adjust it directly to the leg of the wearer. However, make sure that the foot will pass through the ankle's measure prior to cutting the extra fabric.