Rick obtained these coordinates from Mr. GBM , a creature he kept in his garage to perform complex extradimensional math [11].
After the portal fluid is reset, Rick, Morty, and Jerry are sent back to their original universes [14]. To navigate this crisis and track their locations, Rick utilizes a "helpful paper"—a note from a creature whose brain he had been using for calculations [11].
In Rick and Morty Season 6, a "helpful paper" typically refers to the note left by (also known as Mr. GBM) in the season premiere, "Solaricks" [11, 14]. Context of the Note