If your walking foot doesn't have a hole for the seam guide perhaps it's not meant to be used with one. I have several machines and corresponding after market walking feet for them and some of them have the seam guide and hole and some don't. I also have a hole in my machine for the guide when I use regular feet. I rarely use the seam guide as it gets dislodged when I'm wrestling the quilt around so I can't rely on its accuracy. I also find it very distracting to know where to look - the seam guide or the needle - when I'm sewing if the space is too far apart.