Wiper Vacuum Pipe 34

[Leadfoot4U]

There are two vacuum line outlets on my 34 1st generation engine intake. One for the distributor, the other for the wiper. I can't help to notice the pipe for both can be pulled out of the fitting after tightening? Should there be a flair on the end of the copper pipe to seal it or is the straight pipe going through the fitting good enough to create enough vacuum seal to do the job for both functions? What did Henry do?