Look at the space between the upper wing and the engine. The S in LAS is for surleve, raised. The engine was placed higher for different thrust angle in the LAS. Looking at the photos it seems to my eyes that the last and possibly the one
before that are LA and the first four LAS...
From a side view it is easier to compare the propeller shaft position (trust line) and the top of the cockpit nacelle. As much as I can see the Nos 1 to 4 are LAS, No 6 is LA, not sure for No 5, probably LAS.
Regards,
Yavor