I started the swap today, one more thing that I have no idea what I am doing. When I pulled the old unit off it had something connected to it that looked like it was taking vaccum from the side of it. The one ton I put on has a spot that looks like it would be perfect for it but has a plastic thing with two tits on it. Am I suppose to pry it out and plug in what I took off the old one? Sorry for a the "technical" words. I can try to take some pics tommarow but I know one of the smart people can help. thanks