We would like to suggest you the following documents and software that will help you to design your own boards and products based on the Intel Curie module.
https://software.intel.com/en-us/node/674972 Intel® Curie™ Open Developer Kit (ODK): At the end of the guide there is additional documentation that can be used for designing a custom board, for example the BRD file of the Arduino/Genuine 101 board.
Moreover, regarding your question, we'd suggest you to contact Arduino 101 forum (https://forum.arduino.cc/index.php?board=103.0https://forum.arduino.cc/index.php?board=103.0) and post your question there due to your question is related to the design of the 101 board and they are in charge of the Arduino 101 support, so they'll be able to provide a more accurate answer.
