G-code file was exported for MK3S+ MMU3, with generic PETG filament profile.

MMU3 extruder 1: white color
MMU3 extruder 2: black color

Print settings: 0.15 mm QUALITY, 25% infill, 0.4 mm nozzle.

Note that print orientation is face down (same as in provided STL files), to obtain nice flat finish.