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Those pictures look like smd soldering points to me. I'd strongly advise against soldering anything at all on the board- first, it's a nightmare to do, since, as Pulp already stated, all the contacts have to be heated simultaneously with an IC this large. And second, even if you did install it correctly, I wouldn't be surprised if the device just didn't use the extra memory- it could have some hardcoded memory boundaries (although that would be pretty stupid). Oh, and I forgot: You'd void your warranty, and considering the relative fragility of Eink screens, that can't be a Good Thing.
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