ocr: 4Set your A-B switches to either the left or the right. If they are labled, position them both on A. After determining the A side of both switches place a cable from each A side of the A-B switch to one of the remaining connection ports on the 3-Way Switch. (This means that when the A-B switch is positioned to A, the TU that is connected to that A-B switch will be comected to the Cable or Antemna source) Note: The connection you are making will be to one of the two ports located on the A-B Switch opposite to the side which has only one port. The side you comect to will act as A as per diagram. ...