Pololu Orangutan X2 - Manual (Page 24)

(2×3) holes next to the Slave Select hole contain the SPI MISO (Master In, Slave Out), MOSI (Master Out, Slave
In), and SCK (SPI Clock) lines. If you want to connect any additional slave devices, you will need to use these
lines. Please see the
Orangutan X2 schematic [http://www.pololu.com/file/download/ox2_schematic.pdf?file_id=0J22] (71k
pdf) for more details (when looking at the back of the board, pin 1 of schematic item JP2 is the upper-left hole
with the octagonal solder mask — it is labeled MISO in the picture below).
Orangutan X2 SPI and attention pins
Orangutan X2 Command Documentation v1.01 © 2001–2010 Pololu Corporation
4. Attention and SPI Pins Page 24 of 27