The vertical black bars are centered above the nozzles.
I drew a vertical pencil line to center the first bar.
You'll have to cut very close to the bottom box as it butts up against the lip of the cap.
GOTCHA: These decals are thin! I am not going to place the HUGE wrap decal on the body in one piece.
Rub some water on the tube so the decal won't freeze up in the wrong position. A little water "lube" allows movement and makes it easier to remove air bubbles.
TIP: Keep the backing on as you smooth out the first 1/4 of the decal on the tube before sliding the back over to expose and place the next quarter decal. I use a wet Q-tip to roll out water and air working from the center out to the edges.
Smooth as you go removing bubbles before sliding the backing off the next quarter area.
After you set down the first two quarter panels go back and check to be sure the first panel is straight.
Here's the finished assembly - WHEW!