can i block this?(turbo)

[mnnice]

alright ive seen this on a few talons in my area. now i still some what new to the whole turbo scene. so please no hate if this is stupid but the one port in the very center. ive seen it blocked but i dont even know where it goes to? it would be pointed towards the radiator and heres a picture
(this is a small 16g)


thanks for the help