Not all may agree with me here. I was not worried about taking the vapor out of the air box but I wanted to remove any oil condensate carry over into the throttle body. I also did not want to modify my air box at all. I purchased a catch can from DK Custom and installed it like this. I will service the catch can at oil changes to start with. The vapor will still be in the air box with this set up but outside the filter but the oil and condensate should drop out in the catch can in theory.
This set up is a test to see how things go without modifying my stock air box.
You can see the oil in the throttle body in the pic below. My 2017 Tri Glide was right at full or a hair more new on a hot oil level oil check. At my first oil change I set the hot check oil level at 4 dots lower than the full mark with a hot oil level check. This has helped or prevented a lot of the carry over on my other Harley's in the past.
See pic's below. It's pretty straight forward what I did.
Ride Safe All,
Bill G