How do I use the modding system

Hello people,
If I use plugins for modding in my game

according to this
How do I get a list of plugins and their content at runtime
to implement it
IN this example
the guy loads a map
but I just want to load static meshes and behaviour scripts
from the plugin
is there an way to that
I just want to use the original game world
and add additional content.

Is there any functionality in unreal which allows you to load stuff at runtime?