Hello everyone! I知 new here so just getting to grips with how to use the site!

I am routing the cold side of my intercooler piping, and on the throttle body there is a hose underneath the main throttle body intake which connects to the stock intake pipe. I知 wondering what this is for and what do I need to do? Should I blank it off and if so what would you use, or does this need to go into the intercooler piping? Pictures attached below.


Thanks very much in advance