Got into the loft of the tea-house.
Well, not actually, when I built it, I put a hatch in one side of the "atrium."
So with a step stool I can access all the cables.
I connected two new cables to the transformers for the lanterns and pagoda spotlight.
I had to thread them through the trunking between the building and the fence. Only possible by dismantling it. But it's only push-fit.
It's all rolled up ready for reconnection once the fence has been repaired. I used one black and one white cable, so I know which supply is for the different functions.