A couple of points based on my memories of working on D1013 and D1062 in the 1980s, and sincere apologies if these have been raised before and I have missed them in this thread.
On one side of the loco (with B end at the right and A end at the left) is a hinged panel in the bodyside that allows access to the small air compressor's motor. It can be seen here in this photo of D1023 below the cooler group louvres. Like the hinged right-hand bodyside grille, this was a later addition and so does not appear on brand-new locos:
Also, there are four lifting lugs on the top of the cooler group. These are basically square section steel radiused at the bottom to follow the roof line and then welded on. The tops are flat and square and contain a approx. 1 inch diameter tapped hole in to which lifting eyes can be screwed to allow the cooler group to be lifted. They can be seen above bodyside grilles 1 and 3 in this view of D1015:
Tony Willmore