I guess if the Arduino Mega pins 10-13 are set as inputs they won't be a problem.
It's not clear if the Slave Select signal will be on 10 or on 53. Depends on how the libraries are written.
First try jumpers from 11-13 to 50-52 and set 11, 12, and 13 as INPUT pins.
If that doesn't work, add a jumper from 10 to 53 and set 10 as an INPUT as well.
If neither works you may have to invest in the Mega version of the board.