I'm in the process of putting my stock upper manifold back on but have a quick question. There are two nipples underneath it. One has a tube running to another portion of the intake and then off to the side for alittle canister. The 2nd nipple is open. I looked around and it seems the only possible hose to connect it is to big?? It slides on and off way to wasily even with the clip. I traced the line and it goes to the driver side with it connects to this hard plastic line with three other hoses on it. This hose is labeled as "S". Can anyone verify for me this is the proper vacuum line. thanks