Path A with parcels involves adding the parcel repo URL either in the first run Cluster Install wizard or in CM Parcel configs.
Choose Software Installation Method and Install Software
"Parcel Repository - In the Remote Parcel Repository URLs field, click the button and enter the URL of the repository. The URL you specify is added to the list of repositories listed in the Configuring Cloudera Manager Server Parcel Settings page and a parcel is added to the list of parcels on the Select Repository page. If you have multiple repositories configured, you will see all the unique parcels contained in all your repositories."