NL 3Ds

I made 3D objects and i want to use them to decorate my NL works.

How can i put 3D objects into NL simulator? [xx(] couldn't find the way.

I need advice.
Thanks

In the editor, go to Scenery > Choose scene object and then find the 3ds file. Than press open, and click anywhere to place the chosen 3ds object where you want it.