Launch the Seren Kodi add-on.
Navigate to Tools > Open Settings Menu
Go to the Accounts tab and click on Authorize Trakt (if wanted) and follow the instructions on the screen.
Click on Enable Premiumize (if wanted) and Enable Real Debrid (if wanted) and follow the instructions to sync your accounts to the add-on.
Go to the Providers tab and click on Install From Web URL
Type in https://tinyurl.com/a4kscrapers (or https://tinyurl.com/lscrapers if you want the Lambda Scrapers) and click OK
A prompt will come up asking if you’d like to install the scrapers. Press Install and then press OK after they are done.