Why not stitch together the two scenes before and after they call Maz into one? I wish I had the script, but there should be enough there to show they need a specific codebreaker, and if you cut canto bight entirely, you don’t need to explain why they need to go there.
Finn: "No one can get in there, they scramble the shields code every hour."
Poe: “I think I know someone.”
Cut to Finn and Rose leaving on the shuttle. That’s all you need.