Purchase additional coaxial cable from a hardware store, Home Depot, Lowes, or Best Buy store. The connections can be done one of two ways: 1) Run one cable from each TV to one of the three ports on the signal booster. 2) Run one cable to the closest TV and run a second cable the farthest two TVs using a “signal splitter” to split the first cable near TV #2 so they can run a third cable to TV#3.