From a lifecycle manager perspective we have a couple of ways to add keys to the environment
If the my vmware user that is added to lifecycle manager has access to they keys, the keys can automatically discovered and imported. For this we can go to the locker from Home -> Locker -> License. If the keys are not discovered we can click on the refresh button up top to perform a manual sync
If the keys havent been imported or if we need to add a key manually we can click on the add button and complete the fields
Click on validate and add. This will add the key to the catalog and it will be consumable by lifecycle manager when we install the products