Be sure to read the instructions too.
Print or trace the block diagram onto foundation paper, number, and cut out as in the photo.
Because I use freezer paper to foundation piece I just re-used the freezer paper I'd used for the piecing.
Iron the freezer paper to the right side of the corresponding pieced sections, lining up the seam lines.
Trim the inner seam allowances to 1/4".
Baste one of the block sections to the right side of the fabric. Leave enough fabric around the section to be able to attach the other section and have seam allowances on all sides.
Here's where it gets a little tricky.
Mark the lines where the bottom block section would attach to the center section on the right side of the section you just made (the one with the applique).
Place the bottom section right sides together with the center section, lining up the seam lines as in the photo below. Sew the bottom section to this section along one side.
If some if this doesn't make sense, please feel free to email me or ask questions in the comments.