No idea if this will help, but I had the exact same adventure. I posted a few links that helped me in a separate thread which I’ve linked below. All I can say is that it is possible, which is not good advice. But I’ve unfortunately now gotten past the issue, so I’m no longer able to give good advice. But I was qualified a few weeks ago. This will be you too. There’s nothing wrong with the NUC nor with you, just that instructions are not detailed. Hope the below helps.
Miss the Tyne (am a yank back on his side of the Atlantic, but with a lot of English miles under his boots)