They aren't, the steps are:
1) Use allen key to turn release tension on pedal to minimum (IMPORTANT, as they are a bugger to fit otherwise!)
2) Clip front of reflector into place first, then using a then screwdriver slide back in (do it this way as the back is the bit which pivots, not the front)
3) Tighten release tension up to max
repeat for pedal 2, then go and ride.