Add a few comments.

Author: Nathan Seidle

libraries/SPI/examples/Example2_MoreSPIPorts/Example2_MoreSPIPorts.ino

@@ -17,8 +17,8 @@ SPISettings mySettings(SPI_SPEED, SPI_ORDER, SPI_MODE);
 
 const char *msg = "Hello world!";
 
-//SPIClass SPI(); //This is default and automatically defined on RedBoard/ATP/Nano. Uses pads 5/6/7 (SCK/MISO/MOSI).
-SPIClass SPI1(1); //Use IO Master 1 on pads 8/9/10
+//SPIClass SPI(); //This is default and automatically defined on RedBoard/ATP/Nano. Access using pins labeled SCK/MISO/MOSI (connects to pads 5/6/7 on module).
+SPIClass SPI1(1); //Use IO Master 1 on pads 8/9/10. See schematic of your board for pin locations.
 // SPIClass mySPI(2); //Use IO Master 2 on pads 27/25/28
 // SPIClass anotherSPI(3); //Use IO Master 3 on pads 42/43/44
 // SPIClass SPI4(4); //Use IO Master 4 on pads 39/40/38