Hello NUCer, I’m sorry for the inconvenience that you have faced with your NUC.
You may want to try doing a BIOS update since according to your post, the NUC is running BIOS version 0015. The latest version available is 0038; however it will be necessary to install at least 3 versions before flashing the newest.
You could update the BIOS using the following versions:
0021: Intel® Download Center
0028: Intel® Download Center
0034: Intel® Download Center
0038: Intel® Download Center
On the last comment of this thread you will be able to find a user who was able to configure the NUC. You may want to send him a private message asking how he did it. https://communities.intel.com/thread/53224
I would really appreciate if you could share the information on this thread in order to help other users.