Summary
Model Engine is a plugin that allows server owners to add unique mobs to a vanilla Minecraft server. Once a server has Model Engine installed, adding models is quite simple. Once a model is purchased through MC Models, it can easily be installed by following this tutorial!
How to Add Model Engine Models to a Minecraft Server
1. Download the Model Engine item. Sleepy - The Otter will be used for this example.
2. Extract the downloaded file. 
3. Find the following local directory from the folder: /ModelEngine/blueprints . 
4. Minimize the folder to use later in the tutorial.
5. Log in to the BisectHosting Games panel.
6. Stop the server.
7. Go to the Files tab.
8. Find the following directory: /home/container/plugins/ModelEngine/blueprints .
9. Upload any .bbmodel files from Step 4.
10. Start the server. 
