What ribbon cable is this? My laptop battery swelled and this is burnt

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This is the second blade I’ve owned that has had a battery swollen up, one was almost two years old and this is one is not even a year old. This one though the RTX 2070 15” model has a burn mark on this ribbon. What is it for? I’m assuming its related to the battery controller?

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The tear down instructions

Razer Blade 15 Motherboard Replacement

don't say what it is for in step 4. Try tracing it to see where it goes.