interfacing seeeduino mega v1.1 with sd shield

Hi folks, I just bought a Seeeduino mega 1.1 and a seedstudio sd card shield v 2.1 from I thought they were compatible, but when I received them I started having doubts, because the pins of the shield end into the pwm connector instead of spi. Can anyone confirm if these two products are compatible? if not, is there a sd interface fo seeeduino mega 1.1? tks nunzio