To accommodate a display centered on one open side of the rectangular housing, you'll need to modify the 3D model so that the display side has an open frame. I'll provide an STL description that maintains the 3:4:3 ratio, with an open side that would support a centered display occupying the majority of that side.
- The display will be centered and take up 80% of the open side (length and width).
- We'll assume the side being opened is the largest (length by width), leaving a frame on each edge.
Here's an updated STL with the open side:
solid rectangular_housing_with_display