Hello Orionbelt, I’m glad to let you know that we do have software that will allow you to customize the BIOS on your NUC.
The name of the software is Intel® Integrator Toolkit or ITK
You will be able to find additional information at the following link
You can download it here
Orionbelt, please apologize for the inconvenience, I just realized that what you are trying to do is part of the provisioning process of the Intel® Active Management Technology. We do have tools to help you doing this but it will be necessary to get in contact with the main Intel(R) vPro(TM) Technology support group.
For this purpose we have updated our support offering for business customers. Please go to https://bizsupport.intel.com, you can submit and manage any Intel(R) vPro(TM) Technology related tickets. Complete a brief enrollment form, then tickets will be handled directly by Intel engineers. You’ll be able to track the status of your open tickets and view a history of previous ones.