Head to Goodneighbor’s Memory Den and talk to Dr. Amari. Make sure that you have Kellogg’s cybernetic augmentations that you looted from his corpse with you since you’ll be handing it over to Dr. Amari. Nick will volunteer to act as a port. Since the memory from the cybernetic implant is encoded, Amari will suggest running Nick and your minds side by side in order to crack the encrypted memory. Sit in the other memory lounger when you’re ready.