Where they fit. The brake booster line should be obvious as it's the only one that doesn't have a rubber end to fit a nipple. The PCV one is bigger as is the EVAP one. The other EVAP and FPR one can go on either little nipple.
But maybe the SC kit changes the lines, I don't know.
the vacuum line goes in the back of the engine and its hard to locate the hole there if your engine is mounted on, you just have to locate the hole with your hand, then bring the vacuum line in there, push it in and done. the vacuum line comes from the brake booster, thats right