Make sure that you are logged in on the facebook account that is assigned as the manager of the page.
Go to https://www.facebook.com/twitter
Click on the “Link a Page to Twitter” link.
It will then ask you to choose the page you wish to connect to twitter. Just click on the correct “Link to twitter” button right across the page you wish to connect.
It will ask you to enter your credentials and log in. After which, you just need to hit “Authorize app” button.
Once you have authorized the app, it will provide you options on what you would want to automatically post and where between the two sites.
Remember that if you wish to connect a personal account to twitter, it’s the same process except you just need to choose the “Link my profile to twitter” button instead. And only PUBLIC posts will be sent to twitter.
Now you’re ready to connect to the world!