This the Superliner with hay bed which I modified to be pallet auto load. You may auto load and unload pallets, but to manual load or unload you will need a fork lift and ramp due to the curtain cover and collisions.
I will be reuploading the rams in the very near future.
The curtain is color selectable.
When buying in shop auto load text does not show up when selecting, but click right on the auto load selection and it will be enabled auto load.
The mod has 1 warning which does not affect gameplay. (Warning: Texture ‘data/shared/defaultArray_normal.png’ has wrong type (2darray instead of 2d) in ‘default’)
You will also need the autoload mod.
Auto load
https://farmingsimulator22mods.com/pallet-autoload-specialization-v1-7-fs22/