The signal needs to go from the SOURCE on a path to the TV.
If you have the cable going from a Blu-Ray/DVR, etc --> Receiver then you have (Blu-Ray = Source, Receiver = TV)
If the cable is used after the receiver then it would be Receiver --> TV/Projector (Receiver = Source, TV/Projector = TV)
Does that help?
Bottom line... plug it it. If it works it's correct. If you get nothing then you need to reverse the direction.