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Hello, We don't perform in home installations. This is Just Answer- which is a "pay for answer" service. We do this online only. That said, the part you need to purchase is called an "RF splitter" and it would also make sense to get an "RF amplifier" since you're splitting the signal to two TV's now and will lose signal splitting it without an amplifer.
I can find you links to the parts and possibly a tutorial that shows you how to do this yourself if you'd like?
Letme know when you're able to see my reply.