Adding Multiple Color Decals in FS22-Help Needed

[Turk_WLF]

This is my first mod attempt in FS22 for private use. I’m trying to add different color of the same decal.
What I want to be able to do is to select a black decal, red decal, green decal.

However I can’t seem to find how to add the “menu” in the store/mod.

I hope someone can show me what to do.

Thanks,