That looked pretty accurate.
However you were using the mirrors a lot and that orange/red container looked pretty close. How much light does the lorry output for a driver to see such things, 'that accurately'.
I know when I've reversed horseboxes in very dark conditions, I've often put my big torch on something - like a fence post and pointing to where the 'rig' is going to help me see...
If fact why we don't have more light pointing backwards to help these situations I don't know.
If I was the Boss I think I might be looking into such things. As well as a sensor to tell you (of all the sensors!) that you were close to the docking bay to save you bumping into it!
Albeit a gentle one!