Searching where does this Vacuum hose goes to in 1998 es300?

[Synesthesia]

Where does this vacuum hose go to?

Edited February 21, 2023 by Synesthesia
add year of car

[Synesthesia]

OK after doing research and pulling hairs I found the location. It is the line going to the Vapor Pressure Sensor; which is over $200.  The nipple cracked and it is stuck in the hose.  It's no wonder that mechanic didn't tell me.  They didn't want to pay for that part . . . so they were hoping I wouldn't notice.  Advice to other awesome lexus owners of "older/classic" models. . . check your vacuum lines and rubber hoses.  Your car will love you for it. Have an awesome and productive 2023... God bless you all.