Sexis350

so, how do you aline the muffler tips?
mine is kinda too much in... to the point it hits the inner part of rear diffuser or is very close to it.

Vertically its ok i just want them centered.
Directions say hold it while screwing. i ve tried it where the mufflers bolt on and doesnt do much. I cant get to the second part where it connects to midpipe, even when i jacked the car up...