So there must be a way to get the location where Menge stashed the treasure, because Dijkstra can provide support for the Kaer Morhen battle. The problem is, all the guides and/or walkthroughs I've located online just say "go all the way through the conversation with Menge." I've done that, several times, and still Geralt is left looking at Dijkstra going "Uhhhh, I dunno where the treasure is."
Specifically, the guides say which dialogue options to use, up to "Witchers will do anything for gold." Then they say to ask after the treasure, and Menge will just tell you. When I do it, Menge essentially goes "Lol, why would I tell you that?" I'll check again, but I'm away from my Witcher 3 capable PC for another few days.
How do I discover it's location so I don't piss Dijkstra off?