Im going to be doing a boost leak test on my car using the air compressor style DIY ones. I'm taking off the accordian hose, putting the boost leak tester on the turbo inlet. I've heard I need to plug off a hose by the throttle body. I just want to make sure I'm plugging off the right one. I labeled it in red on the following diagram. Can anyone confirm this, as I don't want to hurt my engine. Also I'm assuming this is the only thing I need to plug off, correct? Thanks in advance.
![p1578109_1.jpg](https://www.supramania.com/images/pb_archive/p1578109_1.jpg)