What is the cross-sectional area of the braids? From the picture they look very similar to some standard 40 mm2 braided strands I've seen in France some years ago. 40 mm2 is about the same as AWG 1.
It's 25 mm2 equivalent, but it's 25 mm wide x 2 mm thick. It's rated at 150A. Link: https://www.copperbraid.co.uk/product/flat-super-flexible-25-mm2/