Idle looks correct.
3rd and 4th also look correct (standard ?)
but it should also go above 0 as soon as the turbo comes in during 1st and 2nd.

The t-piece shouldn't matter where it is fitted, if it registers then it's fine.

Just for reference, mines cut in on the inlet manifold vacuum line on the left-hand hose, altho I've also seen them fitted into the right-hand hose with no problems.