Each mod is setup as a plugin in unreal, this allows a strict separation of different mods and allows for a better overview.
Open "Plugins" window
To create a new plugin in Unreal start the Unreal Engine and open the Plugins window.
How to open the plugins window
Create a new plugin
In the plugins window press the “New Plugin” button in the bottom right of the screen.
Create a "Content Only" plugin
Select the “Content only” preset, give your bus mod a name and click “Create Plugin”.
We use the following naming convention for plugins:
MAP_MapName for maps
BUS_BusBrand_ModelName for buses
MISSION_MissionName for missions
CUSTOM_CustomizationName for bus customizations
Check if the plugin was created
After this you should be able to see your new plugin in the content browser
If you don’t see it, you might need to enable plugins in the View Options of the Content Browser