Story-wise, I'd bet good money that Rin's leaf is the unawakened memory one, what with Wakaba getting drawn to it over and over.
However, I'd say that the information wasn't specifically for the memory leaf self, as the instructions were left there in kanji for whoever was reading it to be able to awaken the memory self. That implies that the First Person expected at least one capable reader in the group who wasn't the memory holder.
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u/ActivelyAnonymous Feb 13 '19
>Wrote down instructions for survival and important information to future split selves
>split selves can't read kanji and thus are utterly screwed
RIP. I wonder how different things would be if the First Person left behind some textbooks, though this is hardly a predictable result.