Odds are the SAT-1 and Sat-2 are straight runs to the jacks as labled.. You can test
Roof-sat runs to either a dome or dish or hidden cable end on the roof.
To test: At whichever end of the cable is easier to get to use a OHMMETER, You should see open circuit center to threads.
Now on the other end of what you suspect is the same cable shord the center to the nut (A paper clip will do, or a test clip or ... Well even a peice of kitchen foil)
You should now see near ZERO ohms on the meter
If so, cable passed test and is what it claims to be.