You can copy your Prebid.js setup to any player or unit ad slot in the CMS.
Select the player which config you wish to use, navigate to Monetization section you will see the COPY and PASTE options in the pre-bidding segment.
Click on the copy button.
Go back to the Players section in the menu on the left and select the player to copy the config to, or create a new one. When you scroll to the monetization prebid setup, simply click on the paste button.