tyre change. Which tires to go

Hello! I’m new to this forum, and I just hope I’m right here I bought a Golf 7 with four-wheel (4motion) last spring. There were summer tyres and winter tyres, which I got in autumn. If the summer tyres were about 8000 km, then the workshop installed the winter tyres and I stored the summer tyres over the winter in the basement. Tomorrow I want to reassemble the summer tyres, the only problem: they were not labeled, the I don’t know which tire was where. It’s “Ventus S1 Evo 2” from Hankook. (With a picture of the tread) The tread of all 4 tires looks the same, but 2 are clearly (about 1.5-2mm) more off. (Probably the front were, right?) I now have 3 questions: Thank you for your answers, Christoph