LAKKA 2.0 and DOSBox Mapping

Hello all. I am attempting to get Duke Nukem 3D running within DOSBox on LAKKA 2.0. My goal is to make Duke3D feel more like a modern shooter using both thumbsticks. I have gone through DOSBox 0.74 on my PC and utilized the mapper via ctrl+F1 and set an Xbox 360 controller up how I would like it, for the most part. I know that within LAKKA the right thumb stick is setup as mouse emulation, and the left and right triggers are set as mouse buttons. However, no matter what I set up, I am stuck with the config that is set in the core options. Has anyone had any luck in this endeavor?

No suggestions for this issue?