74 LS4-454

looked in the 82 AIM and service manual for the following:
in pic #1....where does the vacuum line next to the electrical connector go to? could not find the diagrams in the books that show this, maybe I'm not in the right section....
also found that the vacuum line on the other side of the transducer that goes to the rear manifold fitting was toast, replaced that and some other vacuum lines and my idle went from rough to very smooth, no more shaking when stopped in traffic.....

in pic #2 & #3 looks like bubba was here at one time or another, as this wire was just hanging loose in the said area with no where to go, being spliced and attached, with a wire nut and it went though the fire wall, gave a slight tug on the wire and I was holding it in my hand.....

and on the charcoal canister, I see where the PCV goes into the one connection on the top of the canister, but there is another connection next to that on the canister with a hose attached and nowhere to go, anyone know where it's attached to?

thanks for any info.................................... .Tom