You can use this function: https://wiki.rage.mp/index.php?title=Entity::createModelHide
mp.game.entity.createModelHide(x, y, z, radius, model, p5);
For coordinates you can delete the world object with MapEditor for example and read it out of the xml so you'll get coords + hash
Deleted world objects are below the "RemoveFromWorld"
if you don't know the hash ID you can convert the name with
https://wiki.rage.mp/index.php?title=Globals::joaat
mp.game.joaat(String);
Which is used like:
mp.game.entity.createModelHide(x, y, z, radius, mp.game.joaat('objectname'), p5);