That's the temp sensor that circulates coolant through the TB to warm up the air coming through it when it's cold out. If you live in a warm state, zip tie it out of the way. If you live in a cold state then pput it as close tot he incoming air as you posibly can, or just zip tie to to the metal tube.
Kevin (President TBEA)
"WAAAAAAARRRRRIORS, come out to plaaaaay."