I do not see how you resolve the difference in the locations of the SPI pins between the Uno that the shield was meant for and the Mega. The Uno has the SPI pins on pins 11, 12 and 13. The SPI pins on the Mega are 50, 51 and 52.
I do not see how you resolve the difference in the locations of the SPI pins between the Uno that the shield was meant for and the Mega. The Uno has the SPI pins on pins 11, 12 and 13. The SPI pins on the Mega are 50, 51 and 52.