Well if the picture has worked you will see TR1 across the top, thats U1 coming up to TR1 with the outer front corner lined up with the outside of TR1.
Now if I do have U1 correct, the magnet is holding D1 flush with the outside face of TR1 and does not look right. I would expect that to be flat up against U1 further in to give more support.
I had a quick look through book but D1 doesn't seem to have even been fitted further on. I understand people leave this out until engine fitted but I just want to get everything clear and I can remove later if needed.