Installing ro drain in single basin sink? | Terry Love Plumbing Advice & Remodel DIY & Professional Forum

Ok what’s the best option for installing an ro drain for my sink?

1. Install the included saddle drain on the area I highlighted in yellow?
2. Cut and add another p-trap on the horizontal drain section?
3. Use saddle on the vent section above current horizontal section?
4. Another option?

thanks!