560889223, I want to thank you for the pictures too. I do not see anything abnormal in your integration.
Your BIOS/F2 key issue is probably caused by the boot optimization options. You may want to take a look into these articles or other threads about this issue.
Intel� NUC; Using Fast Boot to reduce boot time
Intel� NUC Boards and Kits; Cannot access BIOS Setup with F2 key
