I'd use it for 80A max, not continuous...Never mind, I found more pics, it's 10AWG. Most sources put 10AWG with 200C insulation at 90A max.
I always use 'greenstore' also for Elcon chargers.Well, it's a product of MOSFET specs and the cooling. If those MOSFETs are overspec'ed for 80A, then they may hold more. The thing is, the one you pictured in your testing is likely different from the one on AliExpress website. I.e. made by a different actual vendor. It is often the case that even Chinese products are copied by other Chinese companies without necessarily adhering to original design specs.