File this under miscellaneous ideas that may or may not ever be implemented, but there must be some device in the Star Wars universe which could accurately translate mental imagery into computer data. Why else would Kylo think that Rey was all he needed to assemble a working map to Luke? Traveling through hyperspace requires precise calculations, so any map generated from Rey’s recollections must be pretty damn accurate to be safe. And I assume that the ‘final piece’ of the map isn’t in the archives of the empire, otherwise Kylo would have said so and R2 would have it in his backup data, so it’s not a simple matter of seeing the final planet on the red dotted line.
What would such a device look like? Well, perhaps there’s some sort of headgear involved on Kylo’s part, or perhaps the overcomplicated torture chair has this ability. Some lights shining onto the sides of Rey’s head would be sufficient for establishing that the contents of her mind are being read by computer. It certainly doesn’t need to be as complicated as this:
Thoughts? Am I overthinking this? I tend to do that.