I just picked up a used direcpc dish. I was getting everything fixed up and situated in my yard when I noticed that the LNB seems to have two different places where a standard coax cable could hook in. The LNB is at the end of the arm in a standard square housing and has another box on the arm below it. I dont know what the other box is for. The other box is where the coax hook-in is. I looked at the LNB and it appeared to be cracked open and inside was another hook-in. Anyone have ideas on why this is on which one to hook into to get my feeds?