See also: VR6 spark plug wire removal tool
The firing order for all VR6 motors is 1 - 5 - 3 - 6 - 2 - 4, as in the image below:
In order to properly connect the spark plug wires, you need to know which post on the coilpack is for which cylinder spark plug.
The spark plug wire posts on the VR6 coilpack are like this:
As in the images below:
Connect the angled ends of the spark plug wires to the coil pack:
Then connect each spark plug wire end to the respective cylinder spark plug, as in the image below:
* Take the time to see which wire is for which cylinder, since the wires are different in length! *
Essentially, the wires from the whole BOTTOM row of posts on the coilpack go to the BACK row of engine cylinders (next to the throttle body);
and the wires from the whole TOP row of posts on the coilpack go to the FRONT row of engine cylinders (above the intake manifold runners).