The 2 antennas will have Separate coax that go to the location of the tv. The 2 coaxes will not be connected on to one coax , Connecting the 2 antennas on to one coax will cause cross talk between the 2 antennas and the reception will not be good. 2 separate coaxes will go to the location of the tv and be connected to a Radio Shack 15-1968 remote control A/B switch antenna switch , the output of the A/B switch will connect to the tv. Separate the the antennas by about 3 feet if mounted on the same mast. Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html. Here are places to buy antennas and etc. ,
http://www.winegarddirect.com ,
http://www.solidsignal.com ,
http://www.amazon.com. As examples here are some Strong and Sturdy antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com. Can find the antenna mounts at solidsignal by typing , ronard , in the search box at solidsignal or buy from ronard.