Ian, your first picture is Calais. I've just dug out François de Lannoy's 'Dunkerque 1940' (which does include a bit on Calais) and it shows the quay from another direction.
...and look what we've got lurking in the middle...
Is this the shot that you've seen before ?
All these photographs are credited to the Bundesarchiv.
You'll know the picture that follows of course but I thought that you might like to see the period publication that it appeared in.
Rich