Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
You may need a 'splitter'- type adapter, like this:
(I regret that I am not able to offer Secure Remote Assistance service at this time; However, your request is still open to other Experts in this category, and one of them may pick up on it at any time.)
What are the two monitors? What computer are you trying to run them both off of ?