Anyone know how to piece back together a rocker arm on the D16Z6 Motor?

Can't figure out which synchronizing piston going into which rocker arm.

There's:

1. Primary Rocker Arm
2. Mid-Rocker Arm
3. Secondary Rocker Arm
4. Synchronizing Piston A
5. Synchronizing Piston B

and there's synchronizing pistons in between (1) and (2)
and between (3) and (4)

I thing is that One Piston is longer than the other and I cannot figure out which one goes into Rocker Arm A or B.