Apparently, Jack hasn’t responded back to Nakayama yet, so he has an idea to get a response out of him. Head to the one shop marked on your map to find a paint can inside of the ammo container. To find the Claptrap unit needed, go to Jack’s office and there will be one roaming the hallway there. Give it the paint and it’ll paint an image on the wall, although Jack doesn’t particularly know what the heck it is.

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Give the worker Claptrap the paint can and he’ll draw something…well, it’s something.

Nakayama has another idea to get Jack’s attention, which is to plant some flowers. Head back to the Hub and to the waypoint to find all three flowers you need, then go back to Jack’s office, but not inside. Plant all three right outside the office, only to have to burn them after because they’re a fire hazard. Equip the mission weapon, then return to Nakayama to finish the mission.