Window Panes, shown here, features a 1½" (cut size) strip sewn between the Twist and the Background fabrics. (Press all seam allowances consistently towards the wider/Background fabric.) The placement line on the template is placed in the MIDDLE of this strip when cutting in Step #5.
Obviously, widths for the Twist and Background can be reduced from what the pattern calls for, or plan on THREE cuts instead of TWO in Step #5.
When blocks are joined the inserted strips slide and lock into place for a perfect match, taking your eye in a continuous path from block center to block center.