1. Create a package by the model that you extended.
Save to particular location (30-50 mins).
2. Log in to LCS. Select shared asset library.
3 Select Software deployment packages.
4. Add by select the + and upload the packages and publish.
You will notify 2 packages for what you created.
5. Select the SAT environment in LCS and get in to that environment.
Get same in to the Asset Library of the SAT.
6. Then select maintain and update.
This will be in 19 steps that takes 2 hrs mins.