Our inverter is in a pretty accessible location. I think much of it depends on the Montana model you have. The only thing I would do different is change the orientation to have the on/off switch and display face the compartment door.
2018 Ram 3500 Laramie Longhorn 4X4 Dually Cummins Aisin CC LB / B&W Companion hitch
50 Gallon Transfer Flow in bed tank w/ Trax 3
2018 Montana 3121RL