The 1/4" seam foot (O) has been specifically made for quilting.  Using the black bar as a guide, seam the fabric pieces together.

For 9 mmm machines:

Continental M17, M8, M7, and M6, HMC9480, 9410, 9450, MC 6700P, Skyline S9, S7, S7AE, S6, S6AE