SR- where does this wire run to?

[05civse]

Okay, so I just got my s13 blacktop installed and it runs great. It started first crank, nothing brings a smile to your face faster than that. anyway, I just have one thing. What is this and where does it go? there is a pic of it and the plug that it routes to (the one that is unplugged). If anyone has an sr and know where it goes that would help me a ton. also, the three hoses that go from the intake manifold/ T.B. to the charcol canister and the BOV, which is which? I guesed that the bigger one goes to the canister (duh) and the one that goes from behind the T.B. also goes to the canister leaving the one that is on the T.B. to go to the BOV. I assume that I am correct because I hear the BOV releasing after hard throttle chop but am i really? Thanks guys

BTW this is intake side next to #4 injector plug (incase you didn't know that)