Option 1
Use three coax cables from the outside to the satellite receiver location. Use two coax cables to provide satellite signal to the dual tuners and another coax to carry the signal back out to the 2nd television.
Option 2
Use two coax cables from the outside to the satellite receiver location. Use two coax cables to provide satellite signal to the dual tuners and use diplexers to piggy back the 2nd television signal on to one of the two coax cables.
Option 3
Use DISH Pro Plus upgrade equipment to reduce the two cable requirement for the dual tuners to one coax cable. A second coax should be used to carry the signal back out to the 2nd television.
Option 4
Use DISH Pro Plus upgrade equipment to reduce the two cable requirement for the dual tuners to one coax cable. Use diplexers to piggy back the 2nd television signal on to the one coax cable.