Yeah that’s the one idk where the house that goes out the t goes
If it's all stock, the carb vents run to the tee, then the single hose off the tee belongs in a certain round hole in the back of either air filter housing. It gets placed there to keep it out of the wind, wind pressure on the vent can stop fuel flow into the carbs.
The end of the single hose should have a 45 degree cut so it can't get plugged by contacting the bottom of the hole.
There's two sizes, just use the one that fits, circled in blue. If you use the square hole it may not run right.